IPv4 R&E Routing Table Report 22:20 GMT Sat 15 Feb, 2025 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: 19265 Prefixes after maximum aggregation (per Origin AS): 10469 Deaggregation factor: 1.84 Unique aggregates announced (without unneeded subnets): 11659 Number of IPv4 prefixes with a valid ROA: 7539 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 11724 Total ASes present in the Internet Routing Table: 2780 Prefixes per ASN: 6.93 Origin-only ASes present in the Internet Routing Table: 2410 Origin ASes announcing only one prefix: 1079 Transit ASes present in the Internet Routing Table: 370 Transit-only ASes present in the Internet Routing Table: 69 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.9 Max AS path length visible: 19 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: 46137 Number of 32-bit ASNs visible in the Routing Table: 679 Prefixes from 32-bit ASNs in the Routing Table: 1859 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: 168563456 Equivalent to 10 /8s, 12 /16s and 19 /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: 2304 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4625 Total APNIC prefixes after maximum aggregation: 2236 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4625 Unique aggregates announced from the APNIC address blocks: 2626 APNIC Region origin ASes present in the Internet Routing Table: 559 APNIC Prefixes per ASN: 8.27 APNIC Region origin ASes announcing only one prefix: 238 APNIC Region transit ASes present in the Internet Routing Table: 56 Average APNIC Region AS path length visible: 3.6 Max APNIC Region AS path length visible: 12 Number of APNIC region 32-bit ASNs visible in the Routing Table: 207 Number of APNIC addresses announced to Internet: 35681024 Equivalent to 2 /8s, 32 /16s and 115 /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: 8540 Total ARIN prefixes after maximum aggregation: 4699 ARIN Deaggregation factor: 1.82 Prefixes being announced from the ARIN address blocks: 8550 Unique aggregates announced from the ARIN address blocks: 5194 ARIN Region origin ASes present in the Internet Routing Table: 1288 ARIN Prefixes per ASN: 6.64 ARIN Region origin ASes announcing only one prefix: 460 ARIN Region transit ASes present in the Internet Routing Table: 156 Average ARIN Region AS path length visible: 3.8 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 227 Number of ARIN addresses announced to Internet: 73037056 Equivalent to 4 /8s, 90 /16s and 117 /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: 3544 Total RIPE prefixes after maximum aggregation: 2836 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3535 Unique aggregates announced from the RIPE address blocks: 2928 RIPE Region origin ASes present in the Internet Routing Table: 663 RIPE Prefixes per ASN: 5.33 RIPE Region origin ASes announcing only one prefix: 300 RIPE Region transit ASes present in the Internet Routing Table: 104 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: 153 Number of RIPE addresses announced to Internet: 53281536 Equivalent to 3 /8s, 45 /16s and 3 /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: 1455 Total LACNIC prefixes after maximum aggregation: 525 LACNIC Deaggregation factor: 2.77 Prefixes being announced from the LACNIC address blocks: 1454 Unique aggregates announced from the LACNIC address blocks: 688 LACNIC Region origin ASes present in the Internet Routing Table: 150 LACNIC Prefixes per ASN: 9.69 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: 4.4 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: 4122880 Equivalent to 0 /8s, 62 /16s and 233 /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: 1099 Total AfriNIC prefixes after maximum aggregation: 171 AfriNIC Deaggregation factor: 6.43 Prefixes being announced from the AfriNIC address blocks: 1098 Unique aggregates announced from the AfriNIC address blocks: 220 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 22.41 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 5.0 Max AfriNIC Region AS path length visible: 19 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 27 Number of AfriNIC addresses announced to Internet: 2438400 Equivalent to 0 /8s, 37 /16s and 53 /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 622 2168 463 SINET-AS Research Organization of Informa 7497 450 180 24 CSTNET-AS-AP Computer Network Information 1237 191 74 145 KREONET-AS-KR KISTI, KR 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 168 297 112 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 NKN-CORE-NW NKN Core Network, IN 4538 122 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 534 507 99 CENIC-2152, US 2920 226 44 49 LACOE, US 376 202 162 151 RISQ-AS, CA 5786 181 16 1 UPRENET, PR 18558 140 18 5 NETBLK-RCOEK, US 81 128 471 35 NCREN, US 23024 97 7 17 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 85 542 51 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 786 194 1755 184 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 110 24 5 ISU Internet Services Unit ISU, SA 1103 95 1231 82 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 3267 76 26 66 NIKS, RU 553 75 366 75 BELWUE BelWue-Koordination, DE 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 236 178 42 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 109 25 52 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 4270 53 16 1 Red de Interconexion Universitaria, AR 61468 52 5 17 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 44 99 33 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 470 82 3 KENET-AS, KE 2018 380 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37182 36 8 1 TERNET, TZ 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 8 4 NRaE1-AS, NG 37501 11 49 6 UOFS, ZA 327700 10 16 1 MoRENet, MZ 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 622 2168 463 SINET-AS Research Organization of Informa 2152 534 507 99 CENIC-2152, US 36914 470 82 3 KENET-AS, KE 7497 450 180 24 CSTNET-AS-AP Computer Network Information 2018 380 319 71 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 1916 236 178 42 Rede Nacional de Ensino e Pesquisa, BR 2920 226 44 49 LACOE, US 376 202 162 151 RISQ-AS, CA 786 194 1755 184 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 470 467 KENET-AS, KE 2152 534 435 CENIC-2152, US 7497 450 426 CSTNET-AS-AP Computer Network Information Cente 2018 380 309 TENET-1, ZA 1916 236 194 Rede Nacional de Ensino e Pesquisa, BR 58647 183 181 KAGAWAU-AS Kagawa University, JP 5786 181 180 UPRENET, PR 2920 226 177 LACOE, US 18558 140 135 NETBLK-RCOEK, US 55824 147 126 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 /15:114 /16:1932 /17:424 /18:452 /19:578 /20:863 /21:860 /22:1484 /23:1611 /24:10914 /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 457 470 KENET-AS, KE 8895 107 110 ISU Internet Services Unit ISU, SA 2152 62 534 CENIC-2152, US 23024 36 97 OCDE, US 37182 35 36 TERNET, TZ 3267 34 76 NIKS, RU 32440 33 58 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 31 55 SEAP-AGE, ES 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 40:1 41:191 42:11 44:4 45:46 46:4 47:1 49:11 50:4 52:1 59:19 60:6 61:3 62:7 63:37 64:47 65:19 66:51 67:43 68:18 69:17 70:2 71:1 72:8 74:54 76:36 77:9 78:3 79:10 80:14 81:25 82:7 83:9 84:5 85:51 86:2 87:1 89:10 91:41 92:2 93:14 94:2 95:2 96:5 97:1 98:2 102:10 103:296 104:80 107:2 108:8 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:30 121:27 122:8 123:8 124:42 125:5 128:58 129:39 130:97 131:65 132:64 133:156 134:102 136:181 137:98 138:58 139:5 140:31 141:3 142:41 143:25 144:29 145:2 146:136 147:55 148:199 149:13 150:69 151:13 152:127 153:14 154:45 155:59 156:131 157:23 158:31 159:117 160:31 161:18 162:31 163:59 164:10 165:50 166:2 167:26 168:119 169:7 170:103 171:1 172:2 173:6 174:1 175:16 177:6 179:8 180:16 181:1 182:11 184:1 185:49 186:3 187:21 188:14 189:3 190:34 191:13 192:1387 193:293 194:117 195:71 196:149 197:335 198:531 199:253 200:328 201:36 202:641 203:430 204:401 205:175 206:212 207:313 208:65 209:171 210:222 211:3 212:146 213:6 216:93 217:9 218:22 219:6 220:16 222:2 223:4 End of report