IPv4 R&E Routing Table Report 17:05 GMT Sat 08 Mar, 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: 14353 Prefixes after maximum aggregation (per Origin AS): 8221 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 9030 Number of IPv4 prefixes with a valid ROA: 5936 Number of IPv4 prefixes with an invalid ROA: 1 Number of IPv4 prefixes with no ROA: 8416 Total ASes present in the Internet Routing Table: 2157 Prefixes per ASN: 6.65 Origin-only ASes present in the Internet Routing Table: 1879 Origin ASes announcing only one prefix: 874 Transit ASes present in the Internet Routing Table: 278 Transit-only ASes present in the Internet Routing Table: 40 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: 14 Max AS path prepend of ASN ( 43066) 9 Prefixes from unregistered ASNs in the Routing Table: 0 Number of instances of unregistered ASNs: 0 Number of 32-bit ASNs allocated by the RIRs: 46184 Number of 32-bit ASNs visible in the Routing Table: 540 Prefixes from 32-bit ASNs in the Routing Table: 1431 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: 167764960 Equivalent to 9 /8s, 255 /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: 1711 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3342 Total APNIC prefixes after maximum aggregation: 1695 APNIC Deaggregation factor: 1.97 Prefixes being announced from the APNIC address blocks: 3342 Unique aggregates announced from the APNIC address blocks: 1869 APNIC Region origin ASes present in the Internet Routing Table: 449 APNIC Prefixes per ASN: 7.44 APNIC Region origin ASes announcing only one prefix: 215 APNIC Region transit ASes present in the Internet Routing Table: 41 Average APNIC Region AS path length visible: 4.1 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 201 Number of APNIC addresses announced to Internet: 37310048 Equivalent to 2 /8s, 57 /16s and 78 /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: 6362 Total ARIN prefixes after maximum aggregation: 3642 ARIN Deaggregation factor: 1.75 Prefixes being announced from the ARIN address blocks: 6377 Unique aggregates announced from the ARIN address blocks: 4124 ARIN Region origin ASes present in the Internet Routing Table: 970 ARIN Prefixes per ASN: 6.57 ARIN Region origin ASes announcing only one prefix: 350 ARIN Region transit ASes present in the Internet Routing Table: 118 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: 149 Number of ARIN addresses announced to Internet: 72045376 Equivalent to 4 /8s, 75 /16s and 83 /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: 2990 Total RIPE prefixes after maximum aggregation: 2464 RIPE Deaggregation factor: 1.21 Prefixes being announced from the RIPE address blocks: 2978 Unique aggregates announced from the RIPE address blocks: 2531 RIPE Region origin ASes present in the Internet Routing Table: 562 RIPE Prefixes per ASN: 5.30 RIPE Region origin ASes announcing only one prefix: 256 RIPE Region transit ASes present in the Internet Routing Table: 87 Average RIPE Region AS path length visible: 3.7 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 133 Number of RIPE addresses announced to Internet: 54671488 Equivalent to 3 /8s, 66 /16s and 56 /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: 1024 Total LACNIC prefixes after maximum aggregation: 380 LACNIC Deaggregation factor: 2.69 Prefixes being announced from the LACNIC address blocks: 1020 Unique aggregates announced from the LACNIC address blocks: 446 LACNIC Region origin ASes present in the Internet Routing Table: 115 LACNIC Prefixes per ASN: 8.87 LACNIC Region origin ASes announcing only one prefix: 40 LACNIC Region transit ASes present in the Internet Routing Table: 17 Average LACNIC Region AS path length visible: 4.8 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 46 Number of LACNIC addresses announced to Internet: 3181248 Equivalent to 0 /8s, 48 /16s and 138 /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: 635 Total AfriNIC prefixes after maximum aggregation: 40 AfriNIC Deaggregation factor: 15.88 Prefixes being announced from the AfriNIC address blocks: 634 Unique aggregates announced from the AfriNIC address blocks: 58 AfriNIC Region origin ASes present in the Internet Routing Table: 21 AfriNIC Prefixes per ASN: 30.19 AfriNIC Region origin ASes announcing only one prefix: 13 AfriNIC Region transit ASes present in the Internet Routing Table: 6 Average AfriNIC Region AS path length visible: 5.3 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 11 Number of AfriNIC addresses announced to Internet: 554496 Equivalent to 0 /8s, 8 /16s and 118 /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 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 173 297 116 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4538 136 4192 70 ERX-CERNET-BKB China Education and Resear 2697 57 4 33 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 43 9 11 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 376 199 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 2152 149 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 126 503 34 NCREN, US 23024 97 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 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 786 197 1751 186 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 94 26 73 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 2200 64 630 59 FR-RENATER Reseau National de telecommuni 1653 50 150 48 SUNET SUNET Swedish University Network, E 200521 50 4 32 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 306 178 43 Rede Nacional de Ensino e Pesquisa, BR 11340 109 25 52 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 45 99 34 Fundacao Carlos Chagas Filho de Amparo a 4270 43 16 1 Red de Interconexion Universitaria, AR 61468 39 4 18 CEDIA, EC 1251 36 31 27 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 20191 28 16 1 Pontificia Universidad Catolica de Chile, 3597 20 16 2 Fundacion InnovaT, AR 21612 19 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, 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 528 82 3 KENET-AS, KE 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 8 4 NRaE1-AS, NG 327700 10 16 1 MoRENet, MZ 37654 8 1 5 RwEdNet-AS, RW 327798 4 0 3 BERNET, BI 329326 2 0 1 Accra-Technical-University, GH 3208 1 2 1 ARN, DZ 36944 1 1 1 UBUNTU-UNICAST-AS, MW 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 36914 528 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 1916 306 178 43 Rede Nacional de Ensino e Pesquisa, BR 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 376 199 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 786 197 1751 186 JANET Jisc Services Limited, GB 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 2920 173 34 7 LACOE, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 528 525 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 1916 306 263 Rede Nacional de Ensino e Pesquisa, BR 5786 198 197 UPRENET, PR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 173 166 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 146 126 NKN-CORE-NW NKN Core Network, IN 81 126 92 NCREN, US 23024 97 80 OCDE, US Complete listing at https://bgp.nsrc.org/REN/ASREN/data-CIDRnet 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 /13:16 /14:33 /15:100 /16:1666 /17:311 /18:332 /19:455 /20:622 /21:646 /22:1081 /23:1165 /24:7771 /25:40 /26:71 /27:33 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 504 528 KENET-AS, KE 1916 74 306 Rede Nacional de Ensino e Pesquisa, BR 23024 36 97 OCDE, US 32440 33 57 LONI, US 25977 28 42 HCCS, US 37215 28 34 MAREN, MW 200521 27 50 SEAP-AGE, ES 26898 24 32 LNOCA-ORG, US 36794 24 26 SCOCA, 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 5:15 8:2 12:1 14:93 23:5 24:2 31:1 35:3 37:8 38:4 41:212 42:6 44:3 45:29 46:4 47:1 49:12 50:2 59:16 60:6 61:2 62:5 63:3 64:37 65:3 66:23 67:32 68:1 69:11 70:2 71:1 72:7 74:19 76:33 77:6 78:3 79:10 80:8 81:24 82:3 83:7 84:6 85:31 87:1 89:10 91:37 93:14 94:2 95:2 96:5 98:2 102:2 103:293 104:77 108:7 109:1 111:17 114:1 116:6 118:32 119:30 121:27 122:8 123:8 124:42 128:30 129:30 130:93 131:56 132:51 133:157 134:75 136:197 137:51 138:58 139:10 140:29 141:3 142:28 143:17 144:21 145:2 146:124 147:15 148:9 149:12 150:41 151:9 152:120 153:6 154:20 155:48 156:133 157:17 158:28 159:115 160:34 161:16 162:13 163:60 164:11 165:9 167:7 168:51 169:6 170:77 172:2 173:6 177:3 179:10 180:15 182:1 184:6 185:34 186:3 187:6 188:12 189:3 190:10 191:3 192:1171 193:238 194:81 195:67 196:7 197:321 198:371 199:200 200:278 201:6 202:362 203:185 204:316 205:114 206:162 207:198 208:44 209:94 210:107 211:1 212:38 213:4 216:53 217:12 219:6 222:1 223:4 End of report