IPv4 R&E Routing Table Report 22:20 GMT Fri 20 Dec, 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: 19075 Prefixes after maximum aggregation (per Origin AS): 10426 Deaggregation factor: 1.83 Unique aggregates announced (without unneeded subnets): 11591 Number of IPv4 prefixes with a valid ROA: 7463 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 11610 Total ASes present in the Internet Routing Table: 2774 Prefixes per ASN: 6.88 Origin-only ASes present in the Internet Routing Table: 2403 Origin ASes announcing only one prefix: 1081 Transit ASes present in the Internet Routing Table: 371 Transit-only ASes present in the Internet Routing Table: 66 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: 24 Max AS path prepend of ASN (138136) 20 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: 45985 Number of 32-bit ASNs visible in the Routing Table: 677 Prefixes from 32-bit ASNs in the Routing Table: 1841 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: 3 Number of addresses announced to Internet: 168540416 Equivalent to 10 /8s, 11 /16s and 185 /24s Percentage of available address space announced: 4.6 Percentage of allocated address space announced: 4.6 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: 2321 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4573 Total APNIC prefixes after maximum aggregation: 2224 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4573 Unique aggregates announced from the APNIC address blocks: 2619 APNIC Region origin ASes present in the Internet Routing Table: 553 APNIC Prefixes per ASN: 8.27 APNIC Region origin ASes announcing only one prefix: 236 APNIC Region transit ASes present in the Internet Routing Table: 57 Average APNIC Region AS path length visible: 3.7 Max APNIC Region AS path length visible: 24 Number of APNIC region 32-bit ASNs visible in the Routing Table: 205 Number of APNIC addresses announced to Internet: 35604224 Equivalent to 2 /8s, 31 /16s and 71 /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: 8504 Total ARIN prefixes after maximum aggregation: 4690 ARIN Deaggregation factor: 1.81 Prefixes being announced from the ARIN address blocks: 8517 Unique aggregates announced from the ARIN address blocks: 5175 ARIN Region origin ASes present in the Internet Routing Table: 1287 ARIN Prefixes per ASN: 6.62 ARIN Region origin ASes announcing only one prefix: 460 ARIN Region transit ASes present in the Internet Routing Table: 154 Average ARIN Region AS path length visible: 3.7 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 221 Number of ARIN addresses announced to Internet: 72737536 Equivalent to 4 /8s, 85 /16s and 227 /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: 3511 Total RIPE prefixes after maximum aggregation: 2822 RIPE Deaggregation factor: 1.24 Prefixes being announced from the RIPE address blocks: 3502 Unique aggregates announced from the RIPE address blocks: 2898 RIPE Region origin ASes present in the Internet Routing Table: 668 RIPE Prefixes per ASN: 5.24 RIPE Region origin ASes announcing only one prefix: 303 RIPE Region transit ASes present in the Internet Routing Table: 107 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: 158 Number of RIPE addresses announced to Internet: 53794304 Equivalent to 3 /8s, 52 /16s and 214 /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: 1349 Total LACNIC prefixes after maximum aggregation: 517 LACNIC Deaggregation factor: 2.61 Prefixes being announced from the LACNIC address blocks: 1345 Unique aggregates announced from the LACNIC address blocks: 680 LACNIC Region origin ASes present in the Internet Routing Table: 149 LACNIC Prefixes per ASN: 9.03 LACNIC Region origin ASes announcing only one prefix: 53 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: 65 Number of LACNIC addresses announced to Internet: 3988992 Equivalent to 0 /8s, 60 /16s and 222 /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: 1136 Total AfriNIC prefixes after maximum aggregation: 171 AfriNIC Deaggregation factor: 6.64 Prefixes being announced from the AfriNIC address blocks: 1135 Unique aggregates announced from the AfriNIC address blocks: 216 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 23.16 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 11 Average AfriNIC Region AS path length visible: 3.4 Max AfriNIC Region AS path length visible: 19 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 2412800 Equivalent to 0 /8s, 36 /16s and 209 /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 592 2184 461 SINET-AS Research Organization of Informa 7497 445 180 24 CSTNET-AS-AP Computer Network Information 1237 191 74 145 KREONET-AS-KR KISTI, KR 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 313 113 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4538 120 2384 69 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 69 37 10 UNINET-AS-AP UNINET-, TH 2697 59 4 34 ERX-ERNET-AS Education and Research Netwo 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 2152 514 507 99 CENIC-2152, US 2920 226 44 49 LACOE, US 376 201 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 18558 141 18 5 NETBLK-RCOEK, US 81 127 471 35 NCREN, US 23024 97 7 19 OCDE, US 21976 89 50 15 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/ESnet/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 786 185 1767 182 JANET Jisc Services Limited, GB 8895 132 24 5 ISU Internet Services Unit ISU, SA 559 114 533 104 SWITCH Peering requests: peering@switch.c 1103 94 1231 81 SURFNET-NL SURFnet, The Netherlands, NL 2614 93 26 73 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 78 462 78 BELWUE BelWue-Koordination, DE 3267 76 26 66 NIKS, 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 1916 158 178 41 Rede Nacional de Ensino e Pesquisa, BR 28391 154 10 68 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 53 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 61468 52 5 17 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 4270 46 16 1 Red de Interconexion Universitaria, AR 2715 41 83 30 Fundacao Carlos Chagas Filho de Amparo a 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 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 542 82 3 KENET-AS, KE 2018 378 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 32 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 327700 16 16 1 MoRENet, MZ 37661 12 8 4 NRaE1-AS, NG 37501 11 49 6 UOFS, ZA 36982 8 33 8 UCT, ZA 37654 6 0 5 RwEdNet-AS, RW 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 592 2184 461 SINET-AS Research Organization of Informa 36914 542 82 3 KENET-AS, KE 2152 514 507 99 CENIC-2152, US 7497 445 180 24 CSTNET-AS-AP Computer Network Information 2018 378 319 71 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 2920 226 44 49 LACOE, US 376 201 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 1237 191 74 145 KREONET-AS-KR KISTI, KR 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 542 539 KENET-AS, KE 7497 445 421 CSTNET-AS-AP Computer Network Information Cente 2152 514 415 CENIC-2152, US 2018 378 307 TENET-1, ZA 5786 198 197 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 226 177 LACOE, US 18558 141 136 NETBLK-RCOEK, US 8895 132 127 ISU Internet Services Unit ISU, SA 55824 146 126 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 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 202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH 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/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 /14:33 /15:117 /16:1930 /17:413 /18:448 /19:574 /20:861 /21:863 /22:1480 /23:1600 /24:10756 /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 518 542 KENET-AS, KE 8895 127 132 ISU Internet Services Unit ISU, SA 2152 62 514 CENIC-2152, US 23024 37 97 OCDE, US 32440 36 61 LONI, US 3267 34 76 NIKS, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 54 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 8:5 12:2 14:93 18:43 23:11 24:3 31:1 35:9 37:8 38:13 41:225 42:11 44:4 45:50 46:4 47:1 49:10 50:4 52:1 59:19 60:5 61:3 62:6 63:37 64:46 65:19 66:53 67:43 68:20 69:18 70:2 71:1 72:7 74:53 76:41 77:10 78:3 79:10 80:12 81:25 82:7 83:7 84:4 85:45 86:2 87:1 89:11 91:42 92:2 93:13 94:2 95:2 96:5 97:1 98:2 101:1 102:11 103:292 104:77 107:2 108:8 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:23 121:27 122:8 123:8 124:41 125:5 128:55 129:36 130:97 131:64 132:65 133:155 134:104 136:198 137:98 138:58 139:6 140:31 141:3 142:38 143:25 144:29 145:2 146:137 147:61 148:196 149:13 150:40 151:11 152:127 153:14 154:39 155:60 156:131 157:24 158:33 159:118 160:31 161:18 162:31 163:57 164:10 165:49 166:2 167:26 168:119 169:7 170:94 171:1 172:2 173:7 174:1 175:16 177:6 179:12 180:16 181:1 182:11 184:4 185:48 186:3 187:21 188:14 189:3 190:18 191:13 192:1380 193:262 194:117 195:67 196:145 197:329 198:524 199:254 200:258 201:36 202:638 203:434 204:401 205:173 206:212 207:304 208:65 209:160 210:217 211:3 212:164 213:6 216:91 217:9 218:22 219:6 220:16 222:2 223:4 End of report