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

REN Routing Table Report cscora at bgp.nsrc.org
Sat Sep 30 22:00:43 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 30 Sep, 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:                               23362
    Prefixes after maximum aggregation (per Origin AS):           12869
    Deaggregation factor:                                          1.82
    Unique aggregates announced (without unneeded subnets):       14941
    Number of IPv4 prefixes with a valid ROA:                      9482
    Number of IPv4 prefixes with an invalid ROA:                     22
    Number of IPv4 prefixes with no ROA:                          13858
Total ASes present in the Internet Routing Table:                  2763
    Prefixes per ASN:                                              8.46
Origin-only ASes present in the Internet Routing Table:            2383
Origin ASes announcing only one prefix:                            1045
Transit ASes present in the Internet Routing Table:                 380
Transit-only ASes present in the Internet Routing Table:             68
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:                                      14
    Max AS path prepend of ASN ( 10497)                              11
Prefixes from unregistered ASNs in the Routing Table:                 2
    Number of instances of unregistered ASNs:                         2
Number of 32-bit ASNs allocated by the RIRs:                      42734
Number of 32-bit ASNs visible in the Routing Table:                 631
Prefixes from 32-bit ASNs in the Routing Table:                    1947
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:              8
Number of addresses announced to Internet:                    242324632
    Equivalent to 14 /8s, 113 /16s and 148 /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:               99.5
Total number of prefixes smaller than registry allocations:        3026

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

Prefixes being announced by APNIC Region ASes:                     4642
    Total APNIC prefixes after maximum aggregation:                2288
    APNIC Deaggregation factor:                                    2.03
Prefixes being announced from the APNIC address blocks:            4718
    Unique aggregates announced from the APNIC address blocks:     2684
APNIC Region origin ASes present in the Internet Routing Table:     544
    APNIC Prefixes per ASN:                                        8.67
APNIC Region origin ASes announcing only one prefix:                226
APNIC Region transit ASes present in the Internet Routing Table:     61
Average APNIC Region AS path length visible:                        4.1
    Max APNIC Region AS path length visible:                         14
Number of APNIC region 32-bit ASNs visible in the Routing Table:    204
Number of APNIC addresses announced to Internet:               45658688
    Equivalent to 2 /8s, 184 /16s and 178 /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:                     12496
    Total ARIN prefixes after maximum aggregation:                 6958
    ARIN Deaggregation factor:                                     1.80
Prefixes being announced from the ARIN address blocks:            12283
    Unique aggregates announced from the ARIN address blocks:      8166
ARIN Region origin ASes present in the Internet Routing Table:     1245
    ARIN Prefixes per ASN:                                         9.87
ARIN Region origin ASes announcing only one prefix:                 430
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:                          13
Number of ARIN region 32-bit ASNs visible in the Routing Table:     191
Number of ARIN addresses announced to Internet:               131773624
    Equivalent to 7 /8s, 218 /16s and 180 /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:                      3658
    Total RIPE prefixes after maximum aggregation:                 2878
    RIPE Deaggregation factor:                                     1.27
Prefixes being announced from the RIPE address blocks:             3784
    Unique aggregates announced from the RIPE address blocks:      3076
RIPE Region origin ASes present in the Internet Routing Table:      693
    RIPE Prefixes per ASN:                                         5.46
RIPE Region origin ASes announcing only one prefix:                 303
RIPE Region transit ASes present in the Internet Routing Table:     107
Average RIPE Region AS path length visible:                         3.7
    Max RIPE Region AS path length visible:                          12
Number of RIPE region 32-bit ASNs visible in the Routing Table:     145
Number of RIPE addresses announced to Internet:                58024448
    Equivalent to 3 /8s, 117 /16s and 98 /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:                    1497
    Total LACNIC prefixes after maximum aggregation:                574
    LACNIC Deaggregation factor:                                   2.61
Prefixes being announced from the LACNIC address blocks:           1502
    Unique aggregates announced from the LACNIC address blocks:     788
LACNIC Region origin ASes present in the Internet Routing Table:    164
    LACNIC Prefixes per ASN:                                       9.16
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:               4140448
    Equivalent to 0 /8s, 63 /16s and 45 /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:                   1067
    Total AfriNIC prefixes after maximum aggregation:               169
    AfriNIC Deaggregation factor:                                  6.31
Prefixes being announced from the AfriNIC address blocks:          1067
    Unique aggregates announced from the AfriNIC address blocks:    219
AfriNIC Region origin ASes present in the Internet Routing Table:    48
    AfriNIC Prefixes per ASN:                                     22.23
AfriNIC Region origin ASes announcing only one prefix:               24
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:   24
Number of AfriNIC addresses announced to Internet:              2658560
    Equivalent to 0 /8s, 40 /16s and 145 /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       2163     467  SINET-AS Research Organization of Infor
  7497         437        180      23  CSTNET-AS-AP Computer Network Informati
  1237         195         74     141  KREONET-AS-KR KISTI, KR
  7575         177        329     120  AARNET-AS-AP Australian Academic and Re
 58647         177         18       2  KAGAWAU-AS Kagawa University, JP
  4538         130       4192      73  ERX-CERNET-BKB China Education and Rese
 55824         126         18      17  NKN-CORE-NW NKN Core Network, IN
  4621          69         37       9  UNINET-AS-AP UNINET-, TH
  9411          66         16       2  NONTRINET-AS-AP Kasetsart University, T
  4762          63          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        3525       4640    1552  AMAZON-02, US
 14618         814       4019     613  AMAZON-AES, US
   668         203        651     172  DNIC-AS-00668, US
   376         202        178     151  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
  2152         141        507      92  CSUNET-NW, US
 18558         141         18       4  NETBLK-RCOEK, US
    81         127        521      30  NCREN, US
     1         123          2      46  LVLT-1, 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         283       1903     249  DFN Verein zur Foerderung eines Deutsch
   786         185       1767     182  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         252        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          72          8       1  UNIVERSIDADE FEDERAL DE VICOSA, BR
  2715          59        102      39  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         382        319      71  TENET-1, ZA
 36914         251         82       3  KENET-AS, KE
327687         167         28       3  RENU, UG
  8094          48         48      15  PUKNET, ZA
327700          46         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        3525       4640    1552  AMAZON-02, US
 14618         814       4019     613  AMAZON-AES, US
  2907         599       2163     467  SINET-AS Research Organization of Infor
  7497         437        180      23  CSTNET-AS-AP Computer Network Informati
  2018         382        319      71  TENET-1, ZA
   680         283       1903     249  DFN Verein zur Foerderung eines Deutsch
  1916         252        176      43  Rede Nacional de Ensino e Pesquisa, BR
 36914         251         82       3  KENET-AS, KE
   668         203        651     172  DNIC-AS-00668, US
   376         202        178     151  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         437          414  CSTNET-AS-AP Computer Network Information Cente
  2018         382          311  TENET-1, ZA
 36914         251          248  KENET-AS, KE
  1916         252          209  Rede Nacional de Ensino e Pesquisa, BR
 14618         814          201  AMAZON-AES, US
  5786         197          196  UPRENET, PR
 58647         177          175  KAGAWAU-AS Kagawa University, JP
327687         167          164  RENU, UG
  8895         163          158  ISU Internet Services Unit ISU, SA
 18558         141          137  NETBLK-RCOEK, US

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
    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
45.42.252.0/22       Origin:     16509  AMAZON-02, US
45.42.252.0/22      Transit:     11537  INTERNET2-RESEARCH-EDU, US
64.186.3.0/24        Origin:     16509  AMAZON-02, US
64.186.3.0/24       Transit:     11537  INTERNET2-RESEARCH-EDU, US
134.208.0.0/16       Origin:     17711  NDHU-TW National Dong Hwa University, TW
134.208.0.0/16      Transit:      7539  TWAREN-TW National Center for High-perfo
170.39.88.0/24       Origin:     14618  AMAZON-AES, US
170.39.88.0/24      Transit:     16509  AMAZON-02, US
173.249.168.0/22     Origin:     16509  AMAZON-02, US
173.249.168.0/22    Transit:     11537  INTERNET2-RESEARCH-EDU, 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       /12:17      
/13:26      /14:58      /15:175     /16:2072    /17:484     /18:462     
/19:605     /20:991     /21:1036    /22:1727    /23:1805    /24:13547   
/25:85      /26:60      /27:135     /28:8       /29:57      /30:0       
/31:0       /32:6       

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

   ASN  No of nets  Total ann.  Description
 16509         521        3525  AMAZON-02, US
 14618         264         814  AMAZON-AES, US
 36914         240         251  KENET-AS, KE
  8895         158         163  ISU Internet Services Unit ISU, SA
 32440          81         111  LONI, US
 23024          52         113  OCDE, US
     1          41         123  LVLT-1, US
327700          40          46  MoRENet, MZ
  1916          39         252  Rede Nacional de Ensino e Pesquisa, BR
200521          33          56  SEAP-AGE, ES

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

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

   1:3         3:111       4:2         5:20        6:4         8:2      
  12:1        13:60       14:88       15:97       16:112      18:112    
  23:44       24:3        31:7        34:2        35:13       38:9      
  40:1        41:121      42:10       44:9        45:59       46:10     
  47:1        49:9        50:10       52:846      54:247      58:2      
  59:19       60:5        61:3        62:12       63:37       64:153    
  65:12       66:78       67:63       68:21       69:44       70:27     
  71:16       72:17       74:76       76:49       77:11       78:3      
  79:10       80:11       81:25       82:7        83:6        84:14     
  85:32       86:10       87:2        88:1        89:13       91:57     
  92:2        93:4        94:4        95:2        96:7        97:1      
  98:13       99:67      101:2       102:28      103:299     104:115    
 107:1       108:32      109:11      111:16      114:23      115:1      
 116:10      117:61      118:32      119:18      121:28      122:11     
 123:8       124:40      125:4       128:87      129:53      130:148    
 131:68      132:60      133:152     134:108     135:2       136:213    
 137:146     138:13      139:18      140:44      141:6       142:56     
 143:29      144:40      145:3       146:132     147:63      148:204    
 149:17      150:44      151:24      152:151     153:14      154:31     
 155:83      156:69      157:29      158:43      159:165     160:36     
 161:41      162:66      163:94      164:22      165:57      166:2      
 167:21      168:178     169:12      170:156     171:1       172:12     
 173:27      174:2       175:26      176:12      177:6       178:1      
 179:12      180:15      181:1       182:1       184:8       185:85     
 186:3       187:17      188:15      189:3       190:19      191:13     
 192:1551    193:312     194:132     195:87      196:202     197:166    
 198:507     199:329     200:332     201:38      202:633     203:437    
 204:386     205:157     206:213     207:201     208:118     209:144    
 210:191     211:14      212:169     213:16      214:8       216:167    
 217:10      218:22      219:5       220:16      222:2       223:14     


End of report


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