IPv4 R&E Routing Table Report 17:05 GMT Thu 13 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: 14188 Prefixes after maximum aggregation (per Origin AS): 8102 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 8888 Number of IPv4 prefixes with a valid ROA: 5914 Number of IPv4 prefixes with an invalid ROA: 1 Number of IPv4 prefixes with no ROA: 8273 Total ASes present in the Internet Routing Table: 2141 Prefixes per ASN: 6.63 Origin-only ASes present in the Internet Routing Table: 1866 Origin ASes announcing only one prefix: 872 Transit ASes present in the Internet Routing Table: 275 Transit-only ASes present in the Internet Routing Table: 37 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: 46137 Number of 32-bit ASNs visible in the Routing Table: 530 Prefixes from 32-bit ASNs in the Routing Table: 1416 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: 167450880 Equivalent to 9 /8s, 251 /16s and 25 /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: 1699 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 3345 Total APNIC prefixes after maximum aggregation: 1706 APNIC Deaggregation factor: 1.96 Prefixes being announced from the APNIC address blocks: 3345 Unique aggregates announced from the APNIC address blocks: 1872 APNIC Region origin ASes present in the Internet Routing Table: 454 APNIC Prefixes per ASN: 7.37 APNIC Region origin ASes announcing only one prefix: 217 APNIC Region transit ASes present in the Internet Routing Table: 42 Average APNIC Region AS path length visible: 4.1 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 201 Number of APNIC addresses announced to Internet: 37293664 Equivalent to 2 /8s, 57 /16s and 14 /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: 6235 Total ARIN prefixes after maximum aggregation: 3561 ARIN Deaggregation factor: 1.75 Prefixes being announced from the ARIN address blocks: 6248 Unique aggregates announced from the ARIN address blocks: 4017 ARIN Region origin ASes present in the Internet Routing Table: 963 ARIN Prefixes per ASN: 6.49 ARIN Region origin ASes announcing only one prefix: 351 ARIN Region transit ASes present in the Internet Routing Table: 117 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: 147 Number of ARIN addresses announced to Internet: 71947072 Equivalent to 4 /8s, 73 /16s and 211 /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: 2993 Total RIPE prefixes after maximum aggregation: 2457 RIPE Deaggregation factor: 1.22 Prefixes being announced from the RIPE address blocks: 2983 Unique aggregates announced from the RIPE address blocks: 2538 RIPE Region origin ASes present in the Internet Routing Table: 560 RIPE Prefixes per ASN: 5.33 RIPE Region origin ASes announcing only one prefix: 254 RIPE Region transit ASes present in the Internet Routing Table: 86 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: 132 Number of RIPE addresses announced to Internet: 54668928 Equivalent to 3 /8s, 66 /16s and 46 /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: 949 Total LACNIC prefixes after maximum aggregation: 330 LACNIC Deaggregation factor: 2.88 Prefixes being announced from the LACNIC address blocks: 945 Unique aggregates announced from the LACNIC address blocks: 386 LACNIC Region origin ASes present in the Internet Routing Table: 102 LACNIC Prefixes per ASN: 9.26 LACNIC Region origin ASes announcing only one prefix: 35 LACNIC Region transit ASes present in the Internet Routing Table: 16 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: 37 Number of LACNIC addresses announced to Internet: 2959840 Equivalent to 0 /8s, 45 /16s and 41 /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: 666 Total AfriNIC prefixes after maximum aggregation: 48 AfriNIC Deaggregation factor: 13.88 Prefixes being announced from the AfriNIC address blocks: 665 Unique aggregates announced from the AfriNIC address blocks: 73 AfriNIC Region origin ASes present in the Internet Routing Table: 25 AfriNIC Prefixes per ASN: 26.60 AfriNIC Region origin ASes announcing only one prefix: 15 AfriNIC Region transit ASes present in the Internet Routing Table: 6 Average AfriNIC Region AS path length visible: 5.2 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 13 Number of AfriNIC addresses announced to Internet: 579072 Equivalent to 0 /8s, 8 /16s and 214 /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 174 297 117 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4538 137 4192 70 ERX-CERNET-BKB China Education and Resear 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 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 5786 199 16 1 UPRENET, PR 376 189 161 142 RISQ-AS, CA 2920 173 34 7 LACOE, US 2152 148 507 96 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 125 503 33 NCREN, US 23024 99 7 17 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 85 541 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 786 196 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 90 26 70 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 200521 57 4 23 SEAP-AGE, ES 1653 50 150 48 SUNET SUNET Swedish University Network, E 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 44 83 33 Fundacao Carlos Chagas Filho de Amparo a 4270 43 16 1 Red de Interconexion Universitaria, AR 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 28571 13 37 12 UNIVERSIDADE DE SAO PAULO, 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 541 82 3 KENET-AS, KE 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 13 8 5 NRaE1-AS, NG 30983 12 4 2 MARWAN-AS, MA 327700 10 16 1 MoRENet, MZ 37654 8 1 5 RwEdNet-AS, RW 327798 4 0 3 BERNET, BI 327947 3 1 3 KNUST-, GH 329326 2 0 1 Accra-Technical-University, GH 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 541 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 5786 199 16 1 UPRENET, PR 786 196 1750 188 JANET Jisc Services Limited, GB 376 189 161 142 RISQ-AS, CA 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 297 117 AARNET-AS-AP Australian Academic and Rese 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 541 538 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 1916 306 263 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 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 81 125 92 NCREN, US 23024 99 82 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 /16:1665 /17:309 /18:330 /19:446 /20:610 /21:630 /22:1050 /23:1134 /24:7702 /25:48 /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 517 541 KENET-AS, KE 1916 74 306 Rede Nacional de Ensino e Pesquisa, BR 23024 38 99 OCDE, US 200521 32 57 SEAP-AGE, ES 32440 31 53 LONI, US 37215 28 34 MAREN, MW 25977 27 30 HCCS, US 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 41:219 42:7 44:3 45:23 46:4 47:1 49:12 50:2 59:16 60:6 61:2 62:5 63:3 64:36 65:3 66:21 67:31 68:2 69:11 70:2 71:1 72:7 74:19 76:31 77:6 78:3 79:9 80:8 81:24 82:2 83:7 84:6 85:31 87:1 89:10 91:37 93:14 94:2 95:2 96:5 98:2 102:2 103:294 104:76 108:7 109:1 111:17 114:2 116:6 118:32 119:30 121:27 122:8 123:8 124:42 128:32 129:25 130:93 131:56 132:52 133:157 134:75 136:198 137:51 138:58 139:10 140:29 141:3 142:28 143:17 144:22 145:2 146:124 147:15 148:9 149:12 150:41 151:9 152:119 153:6 154:20 155:40 156:133 157:17 158:28 159:115 160:34 161:14 162:14 163:60 164:11 165:9 167:7 168:51 169:6 170:78 172:2 173:6 177:3 179:10 180:16 182:1 184:6 185:36 186:2 187:1 188:12 189:3 191:3 192:1157 193:238 194:81 195:67 196:8 197:327 198:357 199:200 200:265 201:2 202:365 203:185 204:316 205:111 206:160 207:198 208:39 209:92 210:107 211:1 212:41 213:4 216:53 217:12 219:6 222:2 223:4 End of report