[REN-BGP-stats] Weekly Global IPv4 R&E Routing Table Report

REN Routing Table Report cscora at bgp.nsrc.org
Sat Aug 12 22:00:41 UTC 2023


This is an automated weekly mailing describing the state of the IPv4
Research & Education Routing Table received by NSRC's collector
from Internet2's network.

Daily listings are sent to ren-bgp-stats-all at lists.nsrc.org.

For historical data, please see https://bgp.nsrc.org.

If you have any comments please contact Philip Smith <philip at nsrc.org>.

IPv4 R&E Routing Table Report   22:00 GMT Sat 12 Aug, 2023

  IPv4 BGP Table (R&E) as seen at Internet2.

Report Website:     https://bgp.nsrc.org/REN
Detailed Analysis:  https://bgp.nsrc.org/REN/Internet2/

Analysis Summary
----------------

BGP routing table entries examined:                               23241
    Prefixes after maximum aggregation (per Origin AS):           12766
    Deaggregation factor:                                          1.82
    Unique aggregates announced (without unneeded subnets):       14847
    Number of IPv4 prefixes with a valid ROA:                      9305
    Number of IPv4 prefixes with an invalid ROA:                     21
    Number of IPv4 prefixes with no ROA:                          13915
Total ASes present in the Internet Routing Table:                  2745
    Prefixes per ASN:                                              8.47
Origin-only ASes present in the Internet Routing Table:            2368
Origin ASes announcing only one prefix:                            1042
Transit ASes present in the Internet Routing Table:                 377
Transit-only ASes present in the Internet Routing Table:             69
Paths with bogon ASNs present in the IPv4 Routing Table:              0
Average AS path length visible in the Internet Routing Table:       3.3
    Max AS path length visible:                                      15
    Max AS path prepend of ASN (395156)                              12
Prefixes from unregistered ASNs in the Routing Table:                 3
    Number of instances of unregistered ASNs:                         3
Number of 32-bit ASNs allocated by the RIRs:                      42421
Number of 32-bit ASNs visible in the Routing Table:                 624
Prefixes from 32-bit ASNs in the Routing Table:                    1908
Number of bogon 32-bit ASNs visible in the Routing Table:             0
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:              6
Number of addresses announced to Internet:                    241193464
    Equivalent to 14 /8s, 96 /16s and 81 /24s
    Percentage of available address space announced:                6.5
    Percentage of allocated address space announced:                6.5
    Percentage of available address space allocated:              100.0
    Percentage of address space in use by end-sites:               99.6
Total number of prefixes smaller than registry allocations:        3017

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                     4611
    Total APNIC prefixes after maximum aggregation:                2260
    APNIC Deaggregation factor:                                    2.04
Prefixes being announced from the APNIC address blocks:            4689
    Unique aggregates announced from the APNIC address blocks:     2659
APNIC Region origin ASes present in the Internet Routing Table:     535
    APNIC Prefixes per ASN:                                        8.76
APNIC Region origin ASes announcing only one prefix:                223
APNIC Region transit ASes present in the Internet Routing Table:     57
Average APNIC Region AS path length visible:                        4.0
    Max APNIC Region AS path length visible:                         14
Number of APNIC region 32-bit ASNs visible in the Routing Table:    201
Number of APNIC addresses announced to Internet:               44929088
    Equivalent to 2 /8s, 173 /16s and 144 /24s
APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations)  23552-24575, 37888-38911, 45056-46079, 55296-56319,
                       58368-59391, 63488-64098, 64297-64395, 131072-153913
APNIC Address Blocks     1/8,  14/8,  27/8,  36/8,  39/8,  42/8,  43/8,
                        49/8,  58/8,  59/8,  60/8,  61/8, 101/8, 103/8,
                       106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8,
                       116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8,
                       123/8, 124/8, 125/8, 126/8, 133/8, 150/8, 153/8,
                       163/8, 171/8, 175/8, 180/8, 182/8, 183/8, 202/8,
                       203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8,
                       222/8, 223/8,

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                     12454
    Total ARIN prefixes after maximum aggregation:                 6902
    ARIN Deaggregation factor:                                     1.80
Prefixes being announced from the ARIN address blocks:            12231
    Unique aggregates announced from the ARIN address blocks:      8101
ARIN Region origin ASes present in the Internet Routing Table:     1246
    ARIN Prefixes per ASN:                                         9.82
ARIN Region origin ASes announcing only one prefix:                 432
ARIN Region transit ASes present in the Internet Routing Table:     160
Average ARIN Region AS path length visible:                         2.9
    Max ARIN Region AS path length visible:                          15
Number of ARIN region 32-bit ASNs visible in the Routing Table:     189
Number of ARIN addresses announced to Internet:               131435032
    Equivalent to 7 /8s, 213 /16s and 138 /24s
ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations)  2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
                       35840-36863, 39936-40959, 46080-47103
                       53248-55295, 62464-63487, 64198-64296, 393216-401308
ARIN Address Blocks      3/8,   4/8,   6/8,   7/8,   8/8,   9/8,  11/8,
                        12/8,  13/8,  15/8,  16/8,  17/8,  18/8,  19/8,
                        20/8,  21/8,  22/8,  23/8,  24/8,  26/8,  28/8,
                        29/8,  30/8,  32/8,  33/8,  34/8,  35/8,  38/8,
                        40/8,  44/8,  47/8,  48/8,  50/8,  52/8,  53/8,
                        54/8,  55/8,  56/8,  57/8,  63/8,  64/8,  65/8,
                        66/8,  67/8,  68/8,  69/8,  70/8,  71/8,  72/8,
                        73/8,  74/8,  75/8,  76/8,  96/8,  97/8,  98/8,
                        99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8,
                       130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8,
                       138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8,
                       147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8,
                       158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8,
                       166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8,
                       174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8,
                       206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8,
                      

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                      3623
    Total RIPE prefixes after maximum aggregation:                 2862
    RIPE Deaggregation factor:                                     1.27
Prefixes being announced from the RIPE address blocks:             3760
    Unique aggregates announced from the RIPE address blocks:      3075
RIPE Region origin ASes present in the Internet Routing Table:      683
    RIPE Prefixes per ASN:                                         5.51
RIPE Region origin ASes announcing only one prefix:                 302
RIPE Region transit ASes present in the Internet Routing Table:     105
Average RIPE Region AS path length visible:                         3.6
    Max RIPE Region AS path length visible:                          12
Number of RIPE region 32-bit ASNs visible in the Routing Table:     144
Number of RIPE addresses announced to Internet:                57926400
    Equivalent to 3 /8s, 115 /16s and 227 /24s
RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations)  2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839, 38912-39935
                       40960-45055, 47104-52223, 56320-58367
                       59392-61439, 61952-62463, 64396-64495
                       196608-216475
RIPE Address Blocks      2/8,   5/8,  25/8,  31/8,  37/8,  46/8,  51/8,
                        62/8,  77/8,  78/8,  79/8,  80/8,  81/8,  82/8,
                        83/8,  84/8,  85/8,  86/8,  87/8,  88/8,  89/8,
                        90/8,  91/8,  92/8,  93/8,  94/8,  95/8, 109/8,
                       141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
                       193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    1504
    Total LACNIC prefixes after maximum aggregation:                574
    LACNIC Deaggregation factor:                                   2.62
Prefixes being announced from the LACNIC address blocks:           1509
    Unique aggregates announced from the LACNIC address blocks:     788
LACNIC Region origin ASes present in the Internet Routing Table:    164
    LACNIC Prefixes per ASN:                                       9.20
LACNIC Region origin ASes announcing only one prefix:                62
LACNIC Region transit ASes present in the Internet Routing Table:    26
Average LACNIC Region AS path length visible:                       4.1
    Max LACNIC Region AS path length visible:                        12
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    67
Number of LACNIC addresses announced to Internet:               4269984
    Equivalent to 0 /8s, 65 /16s and 39 /24s
LACNIC AS Blocks       26592-26623, 27648-28671, 52224-53247,
                       61440-61951, 64099-64197, 262144-273820 + ERX transfers
LACNIC Address Blocks  177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
                       191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1046
    Total AfriNIC prefixes after maximum aggregation:               165
    AfriNIC Deaggregation factor:                                  6.34
Prefixes being announced from the AfriNIC address blocks:          1046
    Unique aggregates announced from the AfriNIC address blocks:    218
AfriNIC Region origin ASes present in the Internet Routing Table:    46
    AfriNIC Prefixes per ASN:                                     22.74
AfriNIC Region origin ASes announcing only one prefix:               23
AfriNIC Region transit ASes present in the Internet Routing Table:    9
Average AfriNIC Region AS path length visible:                      2.8
    Max AfriNIC Region AS path length visible:                        9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:   23
Number of AfriNIC addresses announced to Internet:              2631424
    Equivalent to 0 /8s, 40 /16s and 39 /24s
AfriNIC AS Blocks      36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks  41/8,  45/8, 102/8, 105/8, 154/8, 196/8, 197/8,
                      

APNIC Region per AS prefix count summary
----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         599       2146     463  SINET-AS Research Organization of Infor
  7497         435        180      23  CSTNET-AS-AP Computer Network Informati
  1237         194         74     139  KREONET-AS-KR KISTI, KR
 58647         178         18       2  KAGAWAU-AS Kagawa University, JP
  7575         177        329     120  AARNET-AS-AP Australian Academic and Re
  4538         130       4192      73  ERX-CERNET-BKB China Education and Rese
 55824         125         18      17  NKN-CORE-NW NKN Core Network, IN
  4621          69         37      10  UNINET-AS-AP UNINET-, TH
  9411          66         16       2  NONTRINET-AS-AP Kasetsart University, T
  4762          61          4       1  MAHIDOL-BORDER-AS Mahidol University, T

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        3475       4697    1521  AMAZON-02, US
 14618         801       4015     598  AMAZON-AES, US
   668         203        652     172  DNIC-AS-00668, US
   376         202        178     150  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  2152         148        507      92  CSUNET-NW, US
 18558         136         18       4  NETBLK-RCOEK, US
     1         122          2      46  LVLT-1, US
    81         118        458      28  NCREN, US
   270         118        329      82  AS270, US

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         284       1903     249  DFN Verein zur Foerderung eines Deutsch
   786         186       1767     183  JANET Jisc Services Limited, GB
  8895         163         24       5  ISU Internet Services Unit ISU, SA
   559         113        533     105  SWITCH Peering requests: peering at switch
  1103          94       1502      83  SURFNET-NL SURFnet, The Netherlands, NL
  2614          94         27      74  ROEDUNET, RO
   137          82        677      77  ASGARR Consortium GARR, IT
   553          74        465      74  BELWUE BelWue-Koordination, DE
  1930          65         81      60  RCCN Fundacao para a Ciencia e a Tecnol
  2200          64        599      59  FR-RENATER Reseau National de telecommu

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         260        176      43  Rede Nacional de Ensino e Pesquisa, BR
 28391         153         10      67  Universidad Juarez Autonoma de Tabasco,
 11340         104         24      48  Red Universitaria Nacional, CL
271640          73          8       1  UNIVERSIDADE FEDERAL DE VICOSA, BR
  2715          58        102      38  Fundacao Carlos Chagas Filho de Amparo 
  4270          48         16       1  Red de Interconexion Universitaria, AR
 19611          48         17       2  Associacao Antonio Vieira - Unisinos, B
 61468          43          3      14  CEDIA, EC
 28614          38          2       2  Fundacao Universidade Regional de Blume
  3596          35          4       3  Universidad Autonoma Metropolitana, MX

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2018         368        319      71  TENET-1, ZA
 36914         259         82       3  KENET-AS, KE
327687         165         28       3  RENU, UG
  8094          48         48      15  PUKNET, ZA
327700          40         16       1  MoRENet, MZ
  3208          32          2       1  ARN, DZ
  6879          24          2       9  ENSTINET-, EG
 37074          14          8       2  UG-AS, GH
 37501          11         49       6  UOFS, ZA
 37654          10          1       6  RwEdNet-AS, RW

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

   ASN  No of nets  /20 equiv  MaxAgg  Description
 16509        3475       4697    1521  AMAZON-02, US
 14618         801       4015     598  AMAZON-AES, US
  2907         599       2146     463  SINET-AS Research Organization of Infor
  7497         435        180      23  CSTNET-AS-AP Computer Network Informati
  2018         368        319      71  TENET-1, ZA
   680         284       1903     249  DFN Verein zur Foerderung eines Deutsch
  1916         260        176      43  Rede Nacional de Ensino e Pesquisa, BR
 36914         259         82       3  KENET-AS, KE
   668         203        652     172  DNIC-AS-00668, US
   376         202        178     150  RISQ-AS, CA

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-ASnet

Global Per AS Maximum Aggregation summary
-----------------------------------------

   ASN  No of nets  Net Savings  Description
  7497         435          412  CSTNET-AS-AP Computer Network Information Cente
  2018         368          297  TENET-1, ZA
 36914         259          256  KENET-AS, KE
  1916         260          217  Rede Nacional de Ensino e Pesquisa, BR
 14618         801          203  AMAZON-AES, US
  5786         197          196  UPRENET, PR
 58647         178          176  KAGAWAU-AS Kagawa University, JP
327687         165          162  RENU, UG
  8895         163          158  ISU Internet Services Unit ISU, SA
  2907         599          136  SINET-AS Research Organization of Information a

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

    Bad AS  Designation  Net Originated      Transit AS  Transit AS Name
    394607  UNALLOCATED  104.249.65.0/24          23024  OCDE, US
     33008  UNALLOCATED  162.248.66.0/24          11096  FLORIDANET, US
    394607  UNALLOCATED  216.100.93.0/24          23024  OCDE, US

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-badAS

Advertised Unallocated Addresses
--------------------------------

Unassigned Network     ASN Information  AS Name
64.186.3.0/24        Origin:     16509  AMAZON-02, US
64.186.3.0/24       Transit:     11537  INTERNET2-RESEARCH-EDU, US
192.31.196.0/24      Origin:       112  RESERVED, ZZ
192.31.196.0/24     Transit:      1103  SURFNET-NL SURFnet, The Netherlands, NL
193.37.39.0/24       Origin:     16509  AMAZON-02, US
193.37.39.0/24      Transit:     11537  INTERNET2-RESEARCH-EDU, US
193.84.26.0/24       Origin:     16509  AMAZON-02, US
193.84.26.0/24      Transit:     11537  INTERNET2-RESEARCH-EDU, US
198.135.168.0/24     Origin:     14618  AMAZON-AES, US
198.135.168.0/24    Transit:     16509  AMAZON-02, US

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-add-IANA

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:0        /9:1       /10:2       /11:3       /12:16      
/13:25      /14:58      /15:175     /16:2067    /17:485     /18:474     
/19:614     /20:981     /21:1032    /22:1722    /23:1779    /24:13447   
/25:88      /26:64      /27:139     /28:7       /29:56      /30:0       
/31:0       /32:6       

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

   ASN  No of nets  Total ann.  Description
 16509         518        3475  AMAZON-02, US
 14618         261         801  AMAZON-AES, US
 36914         247         259  KENET-AS, KE
  8895         158         163  ISU Internet Services Unit ISU, SA
 32440          80         109  LONI, US
 23024          52         113  OCDE, US
     1          40         122  LVLT-1, US
  1916          39         260  Rede Nacional de Ensino e Pesquisa, BR
327700          34          40  MoRENet, MZ
 28614          32          38  Fundacao Universidade Regional de Blumenau, BR

Complete listing at https://bgp.nsrc.org/REN/Internet2/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

   1:3         3:100       4:2         5:20        6:4         8:2      
  12:1        13:60       14:89       15:96       16:112      18:104    
  23:46       24:3        31:7        34:2        35:13       38:9      
  40:1        41:116      42:10       44:8        45:57       46:10     
  47:1        49:9        50:9        52:846      54:248      58:2      
  59:19       60:4        61:3        62:11       63:37       64:151    
  65:13       66:75       67:63       68:18       69:46       70:27     
  71:16       72:14       74:77       76:48       77:11       78:3      
  79:10       80:13       81:26       82:7        83:6        84:14     
  85:44       86:10       87:2        88:1        89:13       91:56     
  92:2        93:4        94:4        95:2        96:7        97:1      
  98:14       99:67      101:2       102:32      103:289     104:119    
 107:1       108:33      109:11      111:16      114:23      116:10     
 117:61      118:32      119:18      121:28      122:11      123:8      
 124:39      125:4       128:87      129:52      130:147     131:64     
 132:60      133:155     134:108     135:2       136:214     137:147    
 138:13      139:18      140:43      141:5       142:57      143:28     
 144:40      145:3       146:131     147:67      148:203     149:17     
 150:43      151:16      152:138     153:14      154:30      155:83     
 156:71      157:29      158:46      159:164     160:35      161:41     
 162:67      163:94      164:22      165:58      166:2       167:22     
 168:179     169:12      170:148     171:1       172:12      173:26     
 174:2       175:27      176:12      177:5       178:1       179:12     
 180:15      181:1       182:1       184:3       185:82      186:3      
 187:17      188:15      189:3       190:19      191:13      192:1524   
 193:313     194:129     195:83      196:202     197:166     198:511    
 199:338     200:340     201:38      202:630     203:424     204:381    
 205:156     206:212     207:200     208:112     209:144     210:190    
 211:15      212:168     213:16      214:8       216:166     217:11     
 218:22      219:5       220:16      222:2       223:14     

End of report


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