IPv4 R&E Routing Table Report 18:35 GMT Sat 24 May, 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: 17035 Prefixes after maximum aggregation (per Origin AS): 9423 Deaggregation factor: 1.81 Unique aggregates announced (without unneeded subnets): 10311 Number of IPv4 prefixes with a valid ROA: 6687 Number of IPv4 prefixes with an invalid ROA: 5 Number of IPv4 prefixes with no ROA: 10343 Total ASes present in the Internet Routing Table: 2514 Prefixes per ASN: 6.78 Origin-only ASes present in the Internet Routing Table: 2185 Origin ASes announcing only one prefix: 972 Transit ASes present in the Internet Routing Table: 329 Transit-only ASes present in the Internet Routing Table: 53 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.1 Max AS path length visible: 16 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: 46510 Number of 32-bit ASNs visible in the Routing Table: 615 Prefixes from 32-bit ASNs in the Routing Table: 1623 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: 190330880 Equivalent to 11 /8s, 88 /16s and 56 /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: 2107 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4736 Total APNIC prefixes after maximum aggregation: 2275 APNIC Deaggregation factor: 2.08 Prefixes being announced from the APNIC address blocks: 4734 Unique aggregates announced from the APNIC address blocks: 2607 APNIC Region origin ASes present in the Internet Routing Table: 572 APNIC Prefixes per ASN: 8.28 APNIC Region origin ASes announcing only one prefix: 241 APNIC Region transit ASes present in the Internet Routing Table: 50 Average APNIC Region AS path length visible: 5.5 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 214 Number of APNIC addresses announced to Internet: 45539584 Equivalent to 2 /8s, 182 /16s and 225 /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: 6561 Total ARIN prefixes after maximum aggregation: 3688 ARIN Deaggregation factor: 1.78 Prefixes being announced from the ARIN address blocks: 6610 Unique aggregates announced from the ARIN address blocks: 4005 ARIN Region origin ASes present in the Internet Routing Table: 1090 ARIN Prefixes per ASN: 6.06 ARIN Region origin ASes announcing only one prefix: 385 ARIN Region transit ASes present in the Internet Routing Table: 134 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 186 Number of ARIN addresses announced to Internet: 81206272 Equivalent to 4 /8s, 215 /16s and 28 /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: 3622 Total RIPE prefixes after maximum aggregation: 2893 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3606 Unique aggregates announced from the RIPE address blocks: 2945 RIPE Region origin ASes present in the Internet Routing Table: 658 RIPE Prefixes per ASN: 5.48 RIPE Region origin ASes announcing only one prefix: 287 RIPE Region transit ASes present in the Internet Routing Table: 105 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: 152 Number of RIPE addresses announced to Internet: 57946112 Equivalent to 3 /8s, 116 /16s and 48 /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: 1120 Total LACNIC prefixes after maximum aggregation: 416 LACNIC Deaggregation factor: 2.69 Prefixes being announced from the LACNIC address blocks: 1120 Unique aggregates announced from the LACNIC address blocks: 516 LACNIC Region origin ASes present in the Internet Routing Table: 129 LACNIC Prefixes per ASN: 8.68 LACNIC Region origin ASes announcing only one prefix: 55 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 5.5 Max LACNIC Region AS path length visible: 11 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 59 Number of LACNIC addresses announced to Internet: 3974400 Equivalent to 0 /8s, 60 /16s and 165 /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: 963 Total AfriNIC prefixes after maximum aggregation: 146 AfriNIC Deaggregation factor: 6.60 Prefixes being announced from the AfriNIC address blocks: 963 Unique aggregates announced from the AfriNIC address blocks: 236 AfriNIC Region origin ASes present in the Internet Routing Table: 10 AfriNIC Prefixes per ASN: 96.30 AfriNIC Region origin ASes announcing only one prefix: 4 AfriNIC Region transit ASes present in the Internet Routing Table: 4 Average AfriNIC Region AS path length visible: 1.9 Max AfriNIC Region AS path length visible: 5 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4 Number of AfriNIC addresses announced to Internet: 1664000 Equivalent to 0 /8s, 25 /16s and 100 /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 595 2170 464 SINET-AS Research Organization of Informa 7497 454 180 24 CSTNET-AS-AP Computer Network Information 4538 195 4192 72 ERX-CERNET-BKB China Education and Resear 1237 194 74 146 KREONET-AS-KR KISTI, KR 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 172 281 117 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 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 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 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 199 16 1 UPRENET, PR 2920 176 34 7 LACOE, US 2152 147 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 23024 98 7 19 OCDE, US 21976 90 34 16 NJEDGE-NET, US 237 85 542 51 MERIT-AS-14, US 1736 79 16 1 MU-AS, US 3477 73 63 40 NOAA-NWAVE, 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 680 284 1899 250 DFN Verein zur Foerderung eines Deutschen 786 194 1742 187 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 109 24 5 ISU Internet Services Unit ISU, SA 1103 97 1727 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 3267 79 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 243 178 41 Rede Nacional de Ensino e Pesquisa, BR 11340 110 25 52 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 52 100 36 Fundacao Carlos Chagas Filho de Amparo a 61468 52 3 21 CEDIA, EC 19611 48 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 20191 26 16 1 Pontificia Universidad Catolica de Chile, 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 550 80 60 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 6879 24 2 9 ENSTINET-, EG 30983 4 4 1 MARWAN-AS, MA 329522 4 1 2 SANSA, ZA 328225 3 0 1 Strathmore-University, KE 3208 1 2 1 ARN, DZ 6149 1 0 1 TENET-2, ZA 327945 1 0 1 ILRI, KE 329418 1 0 1 International-Centre-Research-Agroforestr 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 595 2170 464 SINET-AS Research Organization of Informa 36914 550 80 60 KENET-AS, KE 7497 454 180 24 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 680 284 1899 250 DFN Verein zur Foerderung eines Deutschen 1916 243 178 41 Rede Nacional de Ensino e Pesquisa, BR 5786 199 16 1 UPRENET, PR 4538 195 4192 72 ERX-CERNET-BKB China Education and Resear 786 194 1742 187 JANET Jisc Services Limited, GB 1237 194 74 146 KREONET-AS-KR KISTI, KR 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 550 490 KENET-AS, KE 7497 454 430 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 1916 243 202 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 176 169 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 147 126 NKN-CORE-NW NKN Core Network, IN 4538 195 123 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 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/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 /12:11 /13:19 /14:35 /15:114 /16:1855 /17:395 /18:419 /19:544 /20:779 /21:788 /22:1284 /23:1392 /24:9397 /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 527 550 KENET-AS, KE 8895 106 109 ISU Internet Services Unit ISU, SA 23024 38 98 OCDE, US 3267 35 79 NIKS, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 57 SEAP-AGE, ES 32440 31 56 LONI, US 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:16 8:2 12:2 14:93 23:8 24:3 31:1 35:9 37:9 38:10 40:1 41:184 42:18 44:5 45:46 46:5 47:1 49:12 50:2 52:1 58:16 59:20 60:6 61:3 62:8 63:32 64:43 65:5 66:39 67:39 68:12 69:17 70:2 71:1 72:8 74:54 76:34 77:9 78:3 79:9 80:13 81:24 82:6 83:8 84:4 85:50 86:6 87:1 89:10 91:41 92:2 93:15 94:2 95:2 97:1 98:2 101:3 102:1 103:312 104:77 108:8 109:4 111:20 113:1 114:24 116:9 117:61 118:35 119:31 121:28 122:8 123:8 124:42 125:5 128:55 129:40 130:96 131:42 132:61 133:156 134:100 136:200 137:53 138:10 139:4 140:31 141:4 143:20 144:26 145:2 146:136 147:51 148:41 149:12 150:37 151:11 152:138 153:15 154:24 155:84 156:133 157:24 158:28 159:116 160:33 161:15 162:21 163:63 164:10 165:42 167:9 168:103 169:6 170:19 171:1 172:2 173:6 175:16 177:5 179:12 180:16 181:1 182:11 184:7 185:50 186:3 187:25 188:15 189:3 190:17 191:13 192:1291 193:302 194:145 195:82 196:138 197:336 198:291 199:138 200:302 201:38 202:630 203:437 204:319 205:60 206:121 207:155 208:62 209:97 210:210 211:4 212:147 213:4 216:72 217:22 218:23 219:7 220:16 222:4 223:16 End of report