IPv4 R&E Routing Table Report 17:05 GMT Thu 10 Apr, 2025 IPv4 BGP Table (R&E) as seen at ASREN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/ASREN/ Analysis Summary ---------------- BGP routing table entries examined: 13708 Prefixes after maximum aggregation (per Origin AS): 8188 Deaggregation factor: 1.67 Unique aggregates announced (without unneeded subnets): 9030 Number of IPv4 prefixes with a valid ROA: 5649 Number of IPv4 prefixes with an invalid ROA: 1 Number of IPv4 prefixes with no ROA: 8058 Total ASes present in the Internet Routing Table: 2087 Prefixes per ASN: 6.57 Origin-only ASes present in the Internet Routing Table: 1820 Origin ASes announcing only one prefix: 859 Transit ASes present in the Internet Routing Table: 267 Transit-only ASes present in the Internet Routing Table: 38 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 13 Max AS path prepend of ASN ( 43066) 9 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 46164 Number of 32-bit ASNs visible in the Routing Table: 515 Prefixes from 32-bit ASNs in the Routing Table: 1295 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: 166257600 Equivalent to 9 /8s, 232 /16s and 227 /24s Percentage of available address space announced: 4.5 Percentage of allocated address space announced: 4.5 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: 1495 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3395 Total APNIC prefixes after maximum aggregation: 1686 APNIC Deaggregation factor: 2.01 Prefixes being announced from the APNIC address blocks: 3395 Unique aggregates announced from the APNIC address blocks: 1833 APNIC Region origin ASes present in the Internet Routing Table: 443 APNIC Prefixes per ASN: 7.66 APNIC Region origin ASes announcing only one prefix: 207 APNIC Region transit ASes present in the Internet Routing Table: 39 Average APNIC Region AS path length visible: 4.0 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 197 Number of APNIC addresses announced to Internet: 37244992 Equivalent to 2 /8s, 56 /16s and 80 /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, 131072-155961 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: 6011 Total ARIN prefixes after maximum aggregation: 3495 ARIN Deaggregation factor: 1.72 Prefixes being announced from the ARIN address blocks: 6060 Unique aggregates announced from the ARIN address blocks: 3930 ARIN Region origin ASes present in the Internet Routing Table: 938 ARIN Prefixes per ASN: 6.46 ARIN Region origin ASes announcing only one prefix: 353 ARIN Region transit ASes present in the Internet Routing Table: 114 Average ARIN Region AS path length visible: 5.0 Max ARIN Region AS path length visible: 10 Number of ARIN region 32-bit ASNs visible in the Routing Table: 145 Number of ARIN addresses announced to Internet: 69779488 Equivalent to 4 /8s, 40 /16s and 192 /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, 393216-402332 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, 45/8, 47/8, 48/8, 50/8, 52/8, 54/8, 55/8, 56/8, 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: 3138 Total RIPE prefixes after maximum aggregation: 2584 RIPE Deaggregation factor: 1.21 Prefixes being announced from the RIPE address blocks: 3125 Unique aggregates announced from the RIPE address blocks: 2641 RIPE Region origin ASes present in the Internet Routing Table: 562 RIPE Prefixes per ASN: 5.56 RIPE Region origin ASes announcing only one prefix: 248 RIPE Region transit ASes present in the Internet Routing Table: 88 Average RIPE Region AS path length visible: 3.8 Max RIPE Region AS path length visible: 12 Number of RIPE region 32-bit ASNs visible in the Routing Table: 130 Number of RIPE addresses announced to Internet: 56374656 Equivalent to 3 /8s, 92 /16s and 53 /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, 53/8, 57/8, 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: 662 Total LACNIC prefixes after maximum aggregation: 364 LACNIC Deaggregation factor: 1.82 Prefixes being announced from the LACNIC address blocks: 658 Unique aggregates announced from the LACNIC address blocks: 544 LACNIC Region origin ASes present in the Internet Routing Table: 75 LACNIC Prefixes per ASN: 8.77 LACNIC Region origin ASes announcing only one prefix: 34 LACNIC Region transit ASes present in the Internet Routing Table: 14 Average LACNIC Region AS path length visible: 4.6 Max LACNIC Region AS path length visible: 10 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 28 Number of LACNIC addresses announced to Internet: 2193888 Equivalent to 0 /8s, 33 /16s and 121 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-274844 + 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: 469 Total AfriNIC prefixes after maximum aggregation: 54 AfriNIC Deaggregation factor: 8.69 Prefixes being announced from the AfriNIC address blocks: 468 Unique aggregates announced from the AfriNIC address blocks: 80 AfriNIC Region origin ASes present in the Internet Routing Table: 29 AfriNIC Prefixes per ASN: 16.14 AfriNIC Region origin ASes announcing only one prefix: 17 AfriNIC Region transit ASes present in the Internet Routing Table: 7 Average AfriNIC Region AS path length visible: 5.7 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 15 Number of AfriNIC addresses announced to Internet: 662272 Equivalent to 0 /8s, 10 /16s and 27 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 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 635 2170 465 SINET-AS Research Organization of Informa 7497 452 180 24 CSTNET-AS-AP Computer Network Information 4538 189 4192 71 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 173 281 116 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 NKN-CORE-NW NKN Core Network, IN 2697 58 4 34 ERX-ERNET-AS Education and Research Netwo 38280 50 3 2 MONASHUNI-MY-AS-AP Monash University Sunw 45773 48 3 5 HECPERN-AS-PK PERN AS Content Servie Prov 132524 42 9 10 TIFR-AS Tata Institute of Fundamental Res Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 376 199 162 149 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 172 34 7 LACOE, US 2152 148 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 111 423 29 NCREN, US 23024 99 7 17 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 84 541 50 MERIT-AS-14, US 1736 79 16 1 MU-AS, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 786 196 1750 188 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 89 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 63 614 58 FR-RENATER Reseau National de telecommuni 200521 57 4 23 SEAP-AGE, ES Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 245 56 121 Rede Nacional de Ensino e Pesquisa, BR 11340 110 25 52 Red Universitaria Nacional, CL 2715 46 99 35 Fundacao Carlos Chagas Filho de Amparo a 1251 36 31 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 20191 28 16 1 Pontificia Universidad Catolica de Chile, 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 28571 12 37 12 UNIVERSIDADE DE SAO PAULO, BR 61468 10 1 9 CEDIA, EC 10715 9 18 3 Universidade Federal de Santa Catarina, B 52888 8 3 6 UNIVERSIDADE FEDERAL DE SAO CARLOS, BR Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 338 82 3 KENET-AS, KE 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 37661 10 8 4 NRaE1-AS, NG 327798 4 0 3 BERNET, BI 327947 3 1 3 KNUST-, GH 37532 2 20 2 ZAMREN, ZM Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 635 2170 465 SINET-AS Research Organization of Informa 7497 452 180 24 CSTNET-AS-AP Computer Network Information 36914 338 82 3 KENET-AS, KE 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 1916 245 56 121 Rede Nacional de Ensino e Pesquisa, BR 376 199 162 149 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 786 196 1750 188 JANET Jisc Services Limited, GB 4538 189 4192 71 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 36914 338 335 KENET-AS, KE 5786 199 198 UPRENET, PR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 172 165 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 147 126 NKN-CORE-NW NKN Core Network, IN 1916 245 124 Rede Nacional de Ensino e Pesquisa, BR 4538 189 118 ERX-CERNET-BKB China Education and Research Net 81 111 82 NCREN, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 36288 UNALLOCATED 64.79.154.0/24 293 ESNET, US 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/ASREN/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 /10:1 /11:0 /12:9 /13:17 /14:33 /15:100 /16:1645 /17:306 /18:325 /19:444 /20:582 /21:616 /22:1031 /23:1145 /24:7299 /25:51 /26:72 /27:31 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 317 338 KENET-AS, KE 1916 75 245 Rede Nacional de Ensino e Pesquisa, BR 23024 38 99 OCDE, US 200521 32 57 SEAP-AGE, ES 32440 31 52 LONI, US 37215 28 34 MAREN, MW 25977 27 30 HCCS, US 26898 24 64 RESERVED, ZZ 36794 24 26 META SOLUTIONS PIKETON, US 60187 23 48 LGFL-AS, GB Complete listing at https://bgp.nsrc.org/REN/ASREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1 5:16 8:2 12:1 14:93 23:5 24:2 31:1 35:3 37:9 38:3 40:1 41:161 42:13 44:3 45:23 46:4 47:1 49:8 50:2 58:15 59:17 60:6 61:2 62:5 63:3 64:34 66:15 67:32 68:2 69:10 70:2 72:7 74:19 76:32 77:6 78:3 79:9 80:8 81:23 82:2 83:7 84:6 85:31 87:1 89:10 91:36 93:14 94:2 95:1 96:5 98:2 101:2 102:3 103:287 104:75 108:5 109:1 111:17 114:1 116:6 118:33 119:30 121:28 122:8 123:8 124:42 128:30 129:33 130:95 131:50 132:51 133:157 134:73 136:198 137:46 138:10 139:10 140:29 141:4 142:25 143:14 144:22 145:2 146:122 147:15 148:7 149:11 150:38 151:5 152:112 153:14 154:20 155:40 156:129 157:24 158:27 159:116 160:34 161:13 162:18 163:59 164:13 165:8 167:6 168:35 169:6 170:10 172:2 173:5 177:2 179:9 180:16 182:1 184:6 185:36 186:1 187:8 188:12 190:1 191:2 192:1158 193:252 194:84 195:67 196:10 197:191 198:357 199:201 200:178 201:2 202:378 203:184 204:313 205:103 206:159 207:196 208:46 209:83 210:107 211:2 212:41 213:4 216:52 217:21 219:6 222:3 223:4 End of report