IPv4 R&E Routing Table Report 22:20 GMT Tue 25 Jun, 2024 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: 18531 Prefixes after maximum aggregation (per Origin AS): 10570 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 11691 Number of IPv4 prefixes with a valid ROA: 5726 Number of IPv4 prefixes with an invalid ROA: 0 Number of IPv4 prefixes with no ROA: 12805 Total ASes present in the Internet Routing Table: 2709 Prefixes per ASN: 6.84 Origin-only ASes present in the Internet Routing Table: 2357 Origin ASes announcing only one prefix: 1042 Transit ASes present in the Internet Routing Table: 352 Transit-only ASes present in the Internet Routing Table: 63 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.7 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 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: 44852 Number of 32-bit ASNs visible in the Routing Table: 626 Prefixes from 32-bit ASNs in the Routing Table: 1720 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: 1 Number of addresses announced to Internet: 175855616 Equivalent to 10 /8s, 123 /16s and 88 /24s Percentage of available address space announced: 4.7 Percentage of allocated address space announced: 4.7 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: 2173 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4195 Total APNIC prefixes after maximum aggregation: 2156 APNIC Deaggregation factor: 1.95 Prefixes being announced from the APNIC address blocks: 4195 Unique aggregates announced from the APNIC address blocks: 2429 APNIC Region origin ASes present in the Internet Routing Table: 502 APNIC Prefixes per ASN: 8.36 APNIC Region origin ASes announcing only one prefix: 219 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 3.8 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 188 Number of APNIC addresses announced to Internet: 35522304 Equivalent to 2 /8s, 30 /16s and 7 /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: 8494 Total ARIN prefixes after maximum aggregation: 4934 ARIN Deaggregation factor: 1.72 Prefixes being announced from the ARIN address blocks: 8505 Unique aggregates announced from the ARIN address blocks: 5483 ARIN Region origin ASes present in the Internet Routing Table: 1300 ARIN Prefixes per ASN: 6.54 ARIN Region origin ASes announcing only one prefix: 457 ARIN Region transit ASes present in the Internet Routing Table: 163 Average ARIN Region AS path length visible: 3.6 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 216 Number of ARIN addresses announced to Internet: 79854336 Equivalent to 4 /8s, 194 /16s and 123 /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, 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: 3451 Total RIPE prefixes after maximum aggregation: 2807 RIPE Deaggregation factor: 1.23 Prefixes being announced from the RIPE address blocks: 3443 Unique aggregates announced from the RIPE address blocks: 2881 RIPE Region origin ASes present in the Internet Routing Table: 659 RIPE Prefixes per ASN: 5.22 RIPE Region origin ASes announcing only one prefix: 296 RIPE Region transit ASes present in the Internet Routing Table: 96 Average RIPE Region AS path length visible: 3.6 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 148 Number of RIPE addresses announced to Internet: 54021376 Equivalent to 3 /8s, 56 /16s and 77 /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: 1335 Total LACNIC prefixes after maximum aggregation: 522 LACNIC Deaggregation factor: 2.56 Prefixes being announced from the LACNIC address blocks: 1334 Unique aggregates announced from the LACNIC address blocks: 705 LACNIC Region origin ASes present in the Internet Routing Table: 153 LACNIC Prefixes per ASN: 8.72 LACNIC Region origin ASes announcing only one prefix: 56 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64 Number of LACNIC addresses announced to Internet: 4046592 Equivalent to 0 /8s, 61 /16s and 191 /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: 1054 Total AfriNIC prefixes after maximum aggregation: 149 AfriNIC Deaggregation factor: 7.07 Prefixes being announced from the AfriNIC address blocks: 1053 Unique aggregates announced from the AfriNIC address blocks: 192 AfriNIC Region origin ASes present in the Internet Routing Table: 30 AfriNIC Prefixes per ASN: 35.10 AfriNIC Region origin ASes announcing only one prefix: 14 AfriNIC Region transit ASes present in the Internet Routing Table: 7 Average AfriNIC Region AS path length visible: 3.2 Max AfriNIC Region AS path length visible: 8 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 10 Number of AfriNIC addresses announced to Internet: 2408960 Equivalent to 0 /8s, 36 /16s and 194 /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 591 2162 464 SINET-AS Research Organization of Infor 7497 445 180 24 CSTNET-AS-AP Computer Network Informati 1237 191 74 142 KREONET-AS-KR KISTI, KR 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 329 113 AARNET-AS-AP Australian Academic and Re 55824 130 19 18 NKN-CORE-NW NKN Core Network, IN 4538 111 2384 69 ERX-CERNET-BKB China Education and Rese 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, T 4621 69 37 10 UNINET-AS-AP UNINET-, TH 23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR 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 668 204 648 173 DNIC-AS-00668, US 376 202 162 151 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 175 34 7 LACOE, US 270 160 345 86 AS270, US 2152 151 507 96 CSUNET-NW, US 18558 140 18 4 NETBLK-RCOEK, US 81 132 469 34 NCREN, US 23024 107 7 21 OCDE, US 237 89 544 55 MERIT-AS-14, 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 1899 249 DFN Verein zur Foerderung eines Deutsch 786 184 1767 181 JANET Jisc Services Limited, GB 8895 135 24 4 ISU Internet Services Unit ISU, SA 559 113 533 103 SWITCH Peering requests: peering@switch 1103 94 1247 82 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 27 72 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnol 553 78 462 78 BELWUE BelWue-Koordination, DE 3267 76 26 66 RUNNET, RU 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 28391 153 10 67 Universidad Juarez Autonoma de Tabasco, 1916 139 176 42 Rede Nacional de Ensino e Pesquisa, BR 11340 109 25 52 Red Universitaria Nacional, CL 271640 64 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 19611 48 17 2 Associacao Antonio Vieira - Unisinos, B 4270 47 16 1 Red de Interconexion Universitaria, AR 2715 44 99 33 Fundacao Carlos Chagas Filho de Amparo 61468 44 5 15 CEDIA, EC 28614 38 2 2 Fundacao Universidade Regional de Blume 3596 37 8 4 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 36914 449 82 3 KENET-AS, KE 2018 381 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 327700 39 16 1 MoRENet, MZ 37215 36 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 6 4 NRaE1-AS, NG 37182 11 8 1 TERNET, TZ 37501 11 49 6 UOFS, ZA 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 591 2162 464 SINET-AS Research Organization of Infor 36914 449 82 3 KENET-AS, KE 7497 445 180 24 CSTNET-AS-AP Computer Network Informati 2018 381 319 71 TENET-1, ZA 680 282 1899 249 DFN Verein zur Foerderung eines Deutsch 668 204 648 173 DNIC-AS-00668, US 376 202 162 151 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 1237 191 74 142 KREONET-AS-KR KISTI, KR 786 184 1767 181 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 36914 449 446 KENET-AS, KE 7497 445 421 CSTNET-AS-AP Computer Network Information Cente 2018 381 310 TENET-1, ZA 5786 198 197 UPRENET, PR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 175 168 LACOE, US 18558 140 136 NETBLK-RCOEK, US 8895 135 131 ISU Internet Services Unit ISU, SA 55824 130 112 NKN-CORE-NW NKN Core Network, IN 81 132 98 NCREN, US 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 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US 22272 UNALLOCATED 206.208.24.0/21 6325 ILLINOIS-CENTURY, US Complete listing at https://bgp.nsrc.org/REN/ESnet/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 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 /15:121 /16:2020 /17:426 /18:444 /19:565 /20:873 /21:889 /22:1412 /23:1525 /24:10221 /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 439 449 KENET-AS, KE 8895 130 135 ISU Internet Services Unit ISU, SA 23024 49 107 OCDE, US 32440 36 62 LONI, US 327700 36 39 MoRENet, MZ 3267 35 76 RUNNET, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 55 SEAP-AGE, ES 25977 30 44 HCCS, US Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:15 6:4 8:5 12:2 14:91 18:43 23:8 24:3 31:1 35:9 38:11 40:1 41:194 42:10 44:5 45:43 46:5 47:1 49:8 50:5 52:1 59:3 60:6 61:3 62:2 63:37 64:44 65:5 66:47 67:44 68:21 69:19 70:2 71:1 72:7 74:54 76:39 77:10 78:3 79:10 80:14 81:25 82:6 83:4 84:4 85:41 86:2 87:1 89:10 91:42 92:2 93:5 94:2 95:2 96:5 97:3 98:2 101:1 102:5 103:217 104:77 107:12 108:6 109:4 114:24 116:6 117:61 118:1 119:22 121:11 123:8 124:41 125:5 128:84 129:40 130:96 131:62 132:66 133:158 134:109 136:197 137:51 138:57 139:5 140:33 141:3 142:25 143:25 144:28 145:2 146:136 147:59 148:194 149:11 150:37 151:11 152:134 153:14 154:37 155:60 156:139 157:19 158:35 159:121 160:30 161:15 162:31 163:59 164:13 165:48 166:2 167:13 168:120 169:6 170:106 171:1 172:3 173:5 174:1 175:7 177:6 179:13 180:15 181:1 182:1 184:6 185:49 186:3 187:16 188:13 189:3 190:18 191:13 192:1494 193:254 194:121 195:64 196:152 197:318 198:481 199:290 200:245 201:36 202:567 203:406 204:377 205:136 206:200 207:205 208:72 209:118 210:186 211:13 212:163 213:5 214:8 216:91 217:9 218:22 219:5 220:17 222:2 223:4 End of report