[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ESnet (R&E) view

REN Routing Table Report cscora at bgp.nsrc.org
Fri Aug 25 22:20:37 UTC 2023


IPv4 R&E Routing Table Report   22:20 GMT Fri 25 Aug, 2023

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

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

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

BGP routing table entries examined:                               19950
    Prefixes after maximum aggregation (per Origin AS):           11576
    Deaggregation factor:                                          1.72
    Unique aggregates announced (without unneeded subnets):       12935
    Number of IPv4 prefixes with a valid ROA:                      5389
    Number of IPv4 prefixes with an invalid ROA:                     43
    Number of IPv4 prefixes with no ROA:                          14518
Total ASes present in the Internet Routing Table:                  2949
    Prefixes per ASN:                                              6.77
Origin-only ASes present in the Internet Routing Table:            2532
Origin ASes announcing only one prefix:                            1121
Transit ASes present in the Internet Routing Table:                 417
Transit-only ASes present in the Internet Routing Table:             87
Paths with bogon ASNs present in the IPv4 Routing Table:              0
Average AS path length visible in the Internet Routing Table:       3.8
    Max AS path length visible:                                      19
    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:                      42498
Number of 32-bit ASNs visible in the Routing Table:                 664
Prefixes from 32-bit ASNs in the Routing Table:                    2065
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:              2
Number of addresses announced to Internet:                    178937088
    Equivalent to 10 /8s, 170 /16s and 93 /24s
    Percentage of available address space announced:                4.8
    Percentage of allocated address space announced:                4.8
    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:        2495

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

Prefixes being announced by APNIC Region ASes:                     4424
    Total APNIC prefixes after maximum aggregation:                2170
    APNIC Deaggregation factor:                                    2.04
Prefixes being announced from the APNIC address blocks:            4408
    Unique aggregates announced from the APNIC address blocks:     2493
APNIC Region origin ASes present in the Internet Routing Table:     513
    APNIC Prefixes per ASN:                                        8.59
APNIC Region origin ASes announcing only one prefix:                214
APNIC Region transit ASes present in the Internet Routing Table:     56
Average APNIC Region AS path length visible:                        3.9
    Max APNIC Region AS path length visible:                         14
Number of APNIC region 32-bit ASNs visible in the Routing Table:    187
Number of APNIC addresses announced to Internet:               35617536
    Equivalent to 2 /8s, 31 /16s and 123 /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:                      9698
    Total ARIN prefixes after maximum aggregation:                 5910
    ARIN Deaggregation factor:                                     1.64
Prefixes being announced from the ARIN address blocks:             9659
    Unique aggregates announced from the ARIN address blocks:      6580
ARIN Region origin ASes present in the Internet Routing Table:     1486
    ARIN Prefixes per ASN:                                         6.50
ARIN Region origin ASes announcing only one prefix:                 541
ARIN Region transit ASes present in the Internet Routing Table:     199
Average ARIN Region AS path length visible:                         3.7
    Max ARIN Region AS path length visible:                          19
Number of ARIN region 32-bit ASNs visible in the Routing Table:     249
Number of ARIN addresses announced to Internet:                82292224
    Equivalent to 4 /8s, 231 /16s and 174 /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:                      3448
    Total RIPE prefixes after maximum aggregation:                 2766
    RIPE Deaggregation factor:                                     1.25
Prefixes being announced from the RIPE address blocks:             3505
    Unique aggregates announced from the RIPE address blocks:      2885
RIPE Region origin ASes present in the Internet Routing Table:      656
    RIPE Prefixes per ASN:                                         5.34
RIPE Region origin ASes announcing only one prefix:                 287
RIPE Region transit ASes present in the Internet Routing Table:     103
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:     136
Number of RIPE addresses announced to Internet:                54271744
    Equivalent to 3 /8s, 60 /16s and 31 /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:                    1465
    Total LACNIC prefixes after maximum aggregation:                572
    LACNIC Deaggregation factor:                                   2.56
Prefixes being announced from the LACNIC address blocks:           1464
    Unique aggregates announced from the LACNIC address blocks:     782
LACNIC Region origin ASes present in the Internet Routing Table:    160
    LACNIC Prefixes per ASN:                                       9.15
LACNIC Region origin ASes announcing only one prefix:                55
LACNIC Region transit ASes present in the Internet Routing Table:    27
Average LACNIC Region AS path length visible:                       4.4
    Max LACNIC Region AS path length visible:                        13
Number of LACNIC region 32-bit ASNs visible in the Routing Table:    67
Number of LACNIC addresses announced to Internet:               4162048
    Equivalent to 0 /8s, 63 /16s and 130 /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:                    912
    Total AfriNIC prefixes after maximum aggregation:               155
    AfriNIC Deaggregation factor:                                  5.88
Prefixes being announced from the AfriNIC address blocks:           912
    Unique aggregates announced from the AfriNIC address blocks:    193
AfriNIC Region origin ASes present in the Internet Routing Table:    45
    AfriNIC Prefixes per ASN:                                     20.27
AfriNIC Region origin ASes announcing only one prefix:               24
AfriNIC Region transit ASes present in the Internet Routing Table:    8
Average AfriNIC Region AS path length visible:                      3.2
    Max AfriNIC Region AS path length visible:                        9
Number of AfriNIC region 32-bit ASNs visible in the Routing Table:   25
Number of AfriNIC addresses announced to Internet:              2527744
    Equivalent to 0 /8s, 38 /16s and 146 /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         579       2127     455  SINET-AS Research Organization of Infor
  7497         434        180      23  CSTNET-AS-AP Computer Network Informati
  1237         187         74     137  KREONET-AS-KR KISTI, KR
 58647         178         18       2  KAGAWAU-AS Kagawa University, JP
  7575         176        329     120  AARNET-AS-AP Australian Academic and Re
 55824         117         18      11  NKN-CORE-NW NKN Core Network, IN
  4538         112       2368      69  ERX-CERNET-BKB China Education and Rese
  4621          68         37       9  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/ESnet/data-ASnet-APNIC

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
   376         202        178     150  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
   668         189        635     162  DNIC-AS-00668, US
 18530         162         27     129  ISOMEDIA-1, US
  2152         145        507      94  CSUNET-NW, US
 11404         136        178     106  AS-WAVE-1, US
 18558         136         18       4  NETBLK-RCOEK, US
    81         126        473      31  NCREN, US
   270         115        329      84  AS270, US
 23024         113          7      17  OCDE, US

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
   680         282       1903     248  DFN Verein zur Foerderung eines Deutsch
   786         185       1767     182  JANET Jisc Services Limited, GB
  8895         135         24       4  ISU Internet Services Unit ISU, SA
   559         113        533     105  SWITCH Peering requests: peering at switch
  1103          93       1246      82  SURFNET-NL SURFnet, The Netherlands, NL
  2614          93         27      73  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/ESnet/data-ASnet-RIPE

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  1916         221        176      42  Rede Nacional de Ensino e Pesquisa, BR
 28391         152         10      66  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          49         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          34          4       3  Universidad Autonoma Metropolitana, MX

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2018         361        319      71  TENET-1, ZA
327687         163         28       3  RENU, UG
 36914         158         82       3  KENET-AS, KE
  8094          48         48      15  PUKNET, ZA
327700          42         16       1  MoRENet, MZ
  3208          32          2       1  ARN, DZ
 37074          14          8       2  UG-AS, GH
 37501          11         49       6  UOFS, ZA
 37654          10          1       6  RwEdNet-AS, RW
 36982           8         33       8  UCT, ZA

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

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

   ASN  No of nets  /20 equiv  MaxAgg  Description
  2907         579       2127     455  SINET-AS Research Organization of Infor
  7497         434        180      23  CSTNET-AS-AP Computer Network Informati
  2018         361        319      71  TENET-1, ZA
   680         282       1903     248  DFN Verein zur Foerderung eines Deutsch
  1916         221        176      42  Rede Nacional de Ensino e Pesquisa, BR
   376         202        178     150  RISQ-AS, CA
  5786         197         16       1  UPRENET, PR
   668         189        635     162  DNIC-AS-00668, US
  1237         187         74     137  KREONET-AS-KR KISTI, KR
   786         185       1767     182  JANET Jisc Services Limited, GB

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

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

   ASN  No of nets  Net Savings  Description
  7497         434          411  CSTNET-AS-AP Computer Network Information Cente
  2018         361          290  TENET-1, ZA
  5786         197          196  UPRENET, PR
  1916         221          179  Rede Nacional de Ensino e Pesquisa, BR
 58647         178          176  KAGAWAU-AS Kagawa University, JP
327687         163          160  RENU, UG
 36914         158          155  KENET-AS, KE
 18558         136          132  NETBLK-RCOEK, US
  8895         135          131  ISU Internet Services Unit ISU, SA
 55824         117          106  NKN-CORE-NW NKN Core Network, IN

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

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

Unassigned Network     ASN Information  AS Name
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
202.58.231.0/24      Origin:    134096  EHEALTHNSW-AS-AP eHealth NSW, AU
202.58.231.0/24     Transit:      7575  AARNET-AS-AP Australian Academic and Res

Complete listing at https://bgp.nsrc.org/REN/ESnet/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        /9:0       /10:0       /11:0       /12:0       
/13:0       /14:35      /15:122     /16:2028    /17:443     /18:444     
/19:600     /20:925     /21:958     /22:1687    /23:1742    /24:10966   
/25:0       /26:0       /27:0       /28:0       /29:0       /30:0       
/31:0       /32:0       

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

   ASN  No of nets  Total ann.  Description
 36914         146         158  KENET-AS, KE
  8895         130         135  ISU Internet Services Unit ISU, SA
 30041          57          70  RACE, US
 18530          55         162  ISOMEDIA-1, US
 23024          52         113  OCDE, US
 19194          43          45  JOVITA, US
327700          36          42  MoRENet, MZ
 32440          34          49  LONI, US
 16713          32          55  NOANET-WA, US
 28614          32          38  Fundacao Universidade Regional de Blumenau, BR

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

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

   1:1         5:15        6:4         8:5        12:1        13:4      
  14:88       18:51       23:42       24:9        31:8        35:4      
  37:3        38:27       40:1        41:89       42:10       44:7      
  45:47       46:6        47:1        49:9        50:9        52:4      
  58:1        59:19       60:4        61:3        62:7        63:89     
  64:102      65:22       66:67       67:55       68:18       69:50     
  70:2        71:1        72:32       74:56       76:49       77:9      
  78:3        79:10       80:13       81:26       82:5        83:6      
  84:5        85:41       86:7        87:5        89:10       91:43     
  92:1        93:6        94:6        95:2        96:5        97:3      
  98:4       101:2       102:32      103:228     104:109     107:17     
 108:14      109:6       111:16      114:23      116:6       117:61     
 118:32      119:18      121:26      122:8       123:8       124:39     
 125:4       128:87      129:47      130:89      131:59      132:58     
 133:151     134:106     136:200     137:132     138:11      139:5      
 140:43      141:2       142:50      143:21      144:14      145:2      
 146:198     147:66      148:193     149:12      150:45      151:14     
 152:141     153:14      154:31      155:63      156:67      157:16     
 158:37      159:115     160:32      161:64      162:47      163:79     
 164:10      165:45      166:3       167:14      168:117     169:8      
 170:78      172:6       173:8       174:8       175:26      177:5      
 179:12      180:15      181:1       182:1       184:3       185:54     
 186:3       187:19      188:14      189:3       190:19      191:13     
 192:1516    193:287     194:123     195:36      196:199     197:96     
 198:570     199:323     200:338     201:39      202:582     203:434    
 204:404     205:143     206:218     207:178     208:113     209:139    
 210:180     211:13      212:168     213:5       214:5       216:121    
 217:10      218:22      219:5       220:16      222:2       223:4      


End of report


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