IPv4 R&E Routing Table Report 17:15 GMT Fri 08 Aug, 2025 IPv4 BGP Table (R&E) as seen at Janet. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/Janet/ Analysis Summary ---------------- BGP routing table entries examined: 18276 Prefixes after maximum aggregation (per Origin AS): 10239 Deaggregation factor: 1.78 Unique aggregates announced (without unneeded subnets): 11307 Number of IPv4 prefixes with a valid ROA: 7705 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 10569 Total ASes present in the Internet Routing Table: 2646 Prefixes per ASN: 6.91 Origin-only ASes present in the Internet Routing Table: 2292 Origin ASes announcing only one prefix: 1017 Transit ASes present in the Internet Routing Table: 354 Transit-only ASes present in the Internet Routing Table: 59 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.8 Max AS path length visible: 16 Max AS path prepend of ASN (395156) 12 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: 47085 Number of 32-bit ASNs visible in the Routing Table: 656 Prefixes from 32-bit ASNs in the Routing Table: 1792 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: 198488576 Equivalent to 11 /8s, 212 /16s and 178 /24s Percentage of available address space announced: 5.4 Percentage of allocated address space announced: 5.4 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: 2039 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4744 Total APNIC prefixes after maximum aggregation: 2289 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4741 Unique aggregates announced from the APNIC address blocks: 2595 APNIC Region origin ASes present in the Internet Routing Table: 586 APNIC Prefixes per ASN: 8.09 APNIC Region origin ASes announcing only one prefix: 247 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 4.6 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 239 Number of APNIC addresses announced to Internet: 45332224 Equivalent to 2 /8s, 179 /16s and 183 /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: 7842 Total ARIN prefixes after maximum aggregation: 4684 ARIN Deaggregation factor: 1.67 Prefixes being announced from the ARIN address blocks: 7892 Unique aggregates announced from the ARIN address blocks: 5228 ARIN Region origin ASes present in the Internet Routing Table: 1256 ARIN Prefixes per ASN: 6.28 ARIN Region origin ASes announcing only one prefix: 438 ARIN Region transit ASes present in the Internet Routing Table: 152 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 210 Number of ARIN addresses announced to Internet: 90368512 Equivalent to 5 /8s, 98 /16s and 234 /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: 3271 Total RIPE prefixes after maximum aggregation: 2632 RIPE Deaggregation factor: 1.24 Prefixes being announced from the RIPE address blocks: 3256 Unique aggregates announced from the RIPE address blocks: 2640 RIPE Region origin ASes present in the Internet Routing Table: 586 RIPE Prefixes per ASN: 5.56 RIPE Region origin ASes announcing only one prefix: 269 RIPE Region transit ASes present in the Internet Routing Table: 101 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: 139 Number of RIPE addresses announced to Internet: 56446208 Equivalent to 3 /8s, 93 /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, 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: 1250 Total LACNIC prefixes after maximum aggregation: 483 LACNIC Deaggregation factor: 2.59 Prefixes being announced from the LACNIC address blocks: 1249 Unique aggregates announced from the LACNIC address blocks: 644 LACNIC Region origin ASes present in the Internet Routing Table: 130 LACNIC Prefixes per ASN: 9.61 LACNIC Region origin ASes announcing only one prefix: 53 LACNIC Region transit ASes present in the Internet Routing Table: 25 Average LACNIC Region AS path length visible: 5.7 Max LACNIC Region AS path length visible: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 60 Number of LACNIC addresses announced to Internet: 3997696 Equivalent to 0 /8s, 61 /16s and 0 /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: 146 AfriNIC Deaggregation factor: 7.78 Prefixes being announced from the AfriNIC address blocks: 1135 Unique aggregates announced from the AfriNIC address blocks: 197 AfriNIC Region origin ASes present in the Internet Routing Table: 27 AfriNIC Prefixes per ASN: 42.04 AfriNIC Region origin ASes announcing only one prefix: 10 AfriNIC Region transit ASes present in the Internet Routing Table: 7 Average AfriNIC Region AS path length visible: 4.8 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 8 Number of AfriNIC addresses announced to Internet: 2341376 Equivalent to 0 /8s, 35 /16s and 186 /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 2153 459 SINET-AS Research Organization of Informa 7497 451 180 23 CSTNET-AS-AP Computer Network Information 1237 194 74 146 KREONET-AS-KR KISTI, KR 4538 194 4192 71 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 170 281 115 AARNET-AS-AP Australian Academic and Rese 55824 149 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 376 200 162 150 RISQ-AS, CA 668 200 648 169 DNIC-AS-00668, US 5786 199 16 1 UPRENET, PR 2920 179 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US 21976 88 34 14 NJEDGE-NET, US 237 85 543 51 MERIT-AS-14, US 1736 78 16 1 MU-AS, US Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 286 1883 252 DFN Verein zur Foerderung eines Deutschen 786 187 1739 182 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 109 24 5 ISU Internet Services Unit ISU, SA 1103 98 1503 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 62 598 57 FR-RENATER Reseau National de telecommuni Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 52 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 61468 52 3 21 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 47 99 35 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 3596 37 8 4 Universidad Autonoma Metropolitana, MX Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 577 82 3 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 37 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37501 11 49 6 UOFS, ZA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA 30983 4 4 1 MARWAN-AS, MA Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 595 2153 459 SINET-AS Research Organization of Informa 36914 577 82 3 KENET-AS, KE 7497 451 180 23 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 680 286 1883 252 DFN Verein zur Foerderung eines Deutschen 1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR 376 200 162 150 RISQ-AS, CA 668 200 648 169 DNIC-AS-00668, US 5786 199 16 1 UPRENET, PR 1237 194 74 146 KREONET-AS-KR KISTI, KR Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 577 574 KENET-AS, KE 7497 451 428 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 1916 240 199 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 179 172 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 149 128 NKN-CORE-NW NKN Core Network, IN 4538 194 123 ERX-CERNET-BKB China Education and Research Net Complete listing at https://bgp.nsrc.org/REN/Janet/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/Janet/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/Janet/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 /15:115 /16:1973 /17:414 /18:453 /19:578 /20:814 /21:824 /22:1322 /23:1474 /24:10243 /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 553 577 KENET-AS, KE 8895 106 109 ISU Internet Services Unit ISU, SA 200521 34 59 SEAP-AGE, ES 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 37215 31 37 MAREN, MW 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 40326 29 33 ECKERD-COLLEGE, US 61468 25 52 CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/Janet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:16 6:4 8:2 12:1 14:93 23:9 24:2 31:1 35:4 37:14 38:10 40:1 41:225 42:14 44:6 45:40 46:5 47:1 49:12 50:2 52:1 58:15 59:20 60:6 61:3 62:6 63:32 64:43 65:5 66:33 67:40 68:12 69:17 70:2 71:1 72:8 74:53 76:25 77:6 78:3 79:9 80:4 81:27 82:3 83:7 84:7 85:28 87:1 89:9 91:37 93:14 94:2 95:2 96:5 97:1 98:2 101:3 102:4 103:342 104:75 108:8 109:7 110:1 111:17 113:1 114:21 116:7 117:61 118:33 119:31 121:28 122:8 123:8 124:42 125:1 128:59 129:44 130:96 131:65 132:68 133:156 134:113 136:200 137:53 138:11 139:5 140:31 141:4 142:26 143:27 144:33 145:4 146:136 147:53 148:200 149:10 150:36 151:7 152:126 153:15 154:39 155:85 156:134 157:23 158:25 159:117 160:34 161:17 162:22 163:72 164:10 165:43 167:12 168:96 169:6 170:18 172:1 173:5 175:16 177:5 179:9 180:16 181:1 182:12 184:6 185:44 186:3 187:24 188:14 190:17 191:13 192:1438 193:254 194:108 195:75 196:144 197:360 198:443 199:273 200:304 201:21 202:628 203:428 204:373 205:134 206:204 207:219 208:61 209:83 210:217 211:6 212:147 213:4 214:9 216:89 217:22 218:2 219:7 220:13 222:4 223:5 End of report