IPv4 R&E Routing Table Report 18:35 GMT Sun 14 Sep, 2025 IPv4 BGP Table (R&E) as seen at KENET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/KENET/ Analysis Summary ---------------- BGP routing table entries examined: 17352 Prefixes after maximum aggregation (per Origin AS): 9653 Deaggregation factor: 1.80 Unique aggregates announced (without unneeded subnets): 10655 Number of IPv4 prefixes with a valid ROA: 7214 Number of IPv4 prefixes with an invalid ROA: 7 Number of IPv4 prefixes with no ROA: 10131 Total ASes present in the Internet Routing Table: 2595 Prefixes per ASN: 6.69 Origin-only ASes present in the Internet Routing Table: 2256 Origin ASes announcing only one prefix: 1020 Transit ASes present in the Internet Routing Table: 339 Transit-only ASes present in the Internet Routing Table: 54 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.2 Max AS path length visible: 19 Max AS path prepend of ASN ( 10497) 11 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 47419 Number of 32-bit ASNs visible in the Routing Table: 682 Prefixes from 32-bit ASNs in the Routing Table: 1762 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: 5 Number of addresses announced to Internet: 189798144 Equivalent to 11 /8s, 80 /16s and 23 /24s Percentage of available address space announced: 5.1 Percentage of allocated address space announced: 5.1 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: 2118 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4815 Total APNIC prefixes after maximum aggregation: 2358 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4810 Unique aggregates announced from the APNIC address blocks: 2667 APNIC Region origin ASes present in the Internet Routing Table: 605 APNIC Prefixes per ASN: 7.95 APNIC Region origin ASes announcing only one prefix: 253 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 5.6 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 248 Number of APNIC addresses announced to Internet: 44642560 Equivalent to 2 /8s, 169 /16s and 49 /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: 6595 Total ARIN prefixes after maximum aggregation: 3732 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 6644 Unique aggregates announced from the ARIN address blocks: 4094 ARIN Region origin ASes present in the Internet Routing Table: 1100 ARIN Prefixes per ASN: 6.04 ARIN Region origin ASes announcing only one prefix: 391 ARIN Region transit ASes present in the Internet Routing Table: 137 Average ARIN Region AS path length visible: 5.4 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 188 Number of ARIN addresses announced to Internet: 81245184 Equivalent to 4 /8s, 215 /16s and 180 /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: 3657 Total RIPE prefixes after maximum aggregation: 2904 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3642 Unique aggregates announced from the RIPE address blocks: 2960 RIPE Region origin ASes present in the Internet Routing Table: 665 RIPE Prefixes per ASN: 5.48 RIPE Region origin ASes announcing only one prefix: 296 RIPE Region transit ASes present in the Internet Routing Table: 106 Average RIPE Region AS path length visible: 5.0 Max RIPE Region AS path length visible: 16 Number of RIPE region 32-bit ASNs visible in the Routing Table: 159 Number of RIPE addresses announced to Internet: 58074624 Equivalent to 3 /8s, 118 /16s and 38 /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: 1222 Total LACNIC prefixes after maximum aggregation: 483 LACNIC Deaggregation factor: 2.53 Prefixes being announced from the LACNIC address blocks: 1222 Unique aggregates announced from the LACNIC address blocks: 657 LACNIC Region origin ASes present in the Internet Routing Table: 131 LACNIC Prefixes per ASN: 9.33 LACNIC Region origin ASes announcing only one prefix: 57 LACNIC Region transit ASes present in the Internet Routing Table: 24 Average LACNIC Region AS path length visible: 6.0 Max LACNIC Region AS path length visible: 19 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 59 Number of LACNIC addresses announced to Internet: 4068096 Equivalent to 0 /8s, 62 /16s and 19 /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: 1030 Total AfriNIC prefixes after maximum aggregation: 171 AfriNIC Deaggregation factor: 6.02 Prefixes being announced from the AfriNIC address blocks: 1029 Unique aggregates announced from the AfriNIC address blocks: 273 AfriNIC Region origin ASes present in the Internet Routing Table: 38 AfriNIC Prefixes per ASN: 27.08 AfriNIC Region origin ASes announcing only one prefix: 23 AfriNIC Region transit ASes present in the Internet Routing Table: 7 Average AfriNIC Region AS path length visible: 2.1 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 1761024 Equivalent to 0 /8s, 26 /16s and 223 /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 598 2169 461 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 196 73 150 KREONET-AS-KR KISTI, KR 4538 188 4192 72 ERX-CERNET-BKB China Education and Resear 58647 179 18 2 KAGAWAU-AS Kagawa University, JP 7575 170 281 114 AARNET-AS-AP Australian Academic and Rese 55824 150 19 22 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 67 37 9 UNINET-AS-AP UNINET-, TH 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 5786 198 16 1 UPRENET, PR 2920 178 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 138 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US 21976 90 34 16 NJEDGE-NET, US 237 84 542 50 MERIT-AS-14, US 1736 79 16 1 MU-AS, US 3477 78 79 37 NOAA-NWAVE, US 22742 70 37 32 CT-EDU-NET, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 190 1742 185 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 77 88 72 RCCN Fundacao para a Ciencia e a Tecnolog 3267 76 29 69 NIKS, RU 553 75 366 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 204 177 41 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 111 25 50 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 53 100 36 Fundacao Carlos Chagas Filho de Amparo a 61468 52 3 21 CEDIA, EC 19611 49 17 2 Associacao Antonio Vieira - Unisinos, BR 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 3596 37 8 4 Universidad Autonoma Metropolitana, MX Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 568 80 53 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 6879 24 2 9 ENSTINET-, EG 327947 6 4 1 KNUST-, GH 30983 4 4 1 MARWAN-AS, MA 37404 4 0 1 University-of-Ibadan, NG 37661 4 6 4 NRaE1-AS, NG 328903 4 0 1 RITER, CI 329522 4 1 2 SANSA, ZA 328076 3 1 1 University-of-Mines-and-Technology, GH Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 598 2169 461 SINET-AS Research Organization of Informa 36914 568 80 53 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 1916 204 177 41 Rede Nacional de Ensino e Pesquisa, BR 5786 198 16 1 UPRENET, PR 1237 196 73 150 KREONET-AS-KR KISTI, KR 786 190 1742 185 JANET Jisc Services Limited, GB 4538 188 4192 72 ERX-CERNET-BKB China Education and Resear Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 568 515 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 5786 198 197 UPRENET, PR 58647 179 177 KAGAWAU-AS Kagawa University, JP 2920 178 171 LACOE, US 1916 204 163 Rede Nacional de Ensino e Pesquisa, BR 18558 138 134 NETBLK-RCOEK, US 55824 150 128 NKN-CORE-NW NKN Core Network, IN 4538 188 116 ERX-CERNET-BKB China Education and Research Net Complete listing at https://bgp.nsrc.org/REN/KENET/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 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/KENET/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 202.46.240.0/20 Origin: 147171 IDNIC-BRIN-AS-ID Badan Riset dan Inovasi 202.46.240.0/20 Transit: 64302 IDNIC-IDREN-AS-ID IDREN - Indonesia Rese 202.46.245.0/24 Origin: 147171 IDNIC-BRIN-AS-ID Badan Riset dan Inovasi 202.46.245.0/24 Transit: 64302 IDNIC-IDREN-AS-ID IDREN - Indonesia Rese 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/KENET/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 /11:1 /12:10 /13:18 /14:35 /15:114 /16:1856 /17:396 /18:410 /19:547 /20:781 /21:794 /22:1310 /23:1413 /24:9665 /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 545 568 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 31638 44 44 ASN-LEPIDA, IT 200521 33 58 SEAP-AGE, ES 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 3267 31 76 NIKS, RU 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 40326 29 33 ECKERD-COLLEGE, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:18 8:2 12:2 14:92 23:8 24:3 31:1 35:4 37:26 38:10 40:1 41:190 42:18 44:6 45:40 46:5 47:1 49:12 50:2 52:1 58:15 59:20 60:6 61:3 62:8 63:32 64:43 65:5 66:40 67:40 68:12 69:17 70:2 71:1 72:8 74:55 76:25 77:9 78:3 79:9 80:13 81:27 82:6 83:8 84:4 85:48 86:6 87:1 89:15 91:41 92:2 93:15 94:2 95:2 97:1 98:2 101:3 102:11 103:359 104:75 108:8 109:7 110:1 111:5 113:1 114:21 116:8 117:61 118:34 119:31 121:12 122:8 123:8 124:42 125:5 128:57 129:42 130:95 131:42 132:59 133:153 134:103 136:199 137:54 138:11 139:4 140:32 141:3 143:18 144:40 145:12 146:138 147:50 148:200 149:11 150:36 151:10 152:136 153:15 154:25 155:88 156:133 157:25 158:29 159:116 160:34 161:31 162:21 163:74 164:10 165:43 167:8 168:102 169:6 170:19 171:1 172:1 173:5 175:16 177:4 179:13 180:16 181:1 182:12 184:20 185:52 186:4 187:24 188:21 190:17 191:13 192:1317 193:293 194:144 195:83 196:139 197:352 198:298 199:138 200:298 201:22 202:633 203:442 204:324 205:60 206:116 207:156 208:59 209:63 210:221 211:4 212:146 213:4 216:70 217:23 218:23 219:7 220:16 222:4 223:16 End of report