IPv4 R&E Routing Table Report 18:30 GMT Tue 16 Sep, 2025 IPv4 BGP Table (R&E) as seen at TENET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/TENET/ Analysis Summary ---------------- BGP routing table entries examined: 16408 Prefixes after maximum aggregation (per Origin AS): 8671 Deaggregation factor: 1.89 Unique aggregates announced (without unneeded subnets): 9854 Number of IPv4 prefixes with a valid ROA: 6513 Number of IPv4 prefixes with an invalid ROA: 4 Number of IPv4 prefixes with no ROA: 9891 Total ASes present in the Internet Routing Table: 2376 Prefixes per ASN: 6.91 Origin-only ASes present in the Internet Routing Table: 2082 Origin ASes announcing only one prefix: 908 Transit ASes present in the Internet Routing Table: 294 Transit-only ASes present in the Internet Routing Table: 48 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.4 Max AS path length visible: 17 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: 47428 Number of 32-bit ASNs visible in the Routing Table: 617 Prefixes from 32-bit ASNs in the Routing Table: 1644 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: 158194176 Equivalent to 9 /8s, 109 /16s and 218 /24s Percentage of available address space announced: 4.3 Percentage of allocated address space announced: 4.3 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: 1799 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4824 Total APNIC prefixes after maximum aggregation: 2359 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4819 Unique aggregates announced from the APNIC address blocks: 2672 APNIC Region origin ASes present in the Internet Routing Table: 606 APNIC Prefixes per ASN: 7.95 APNIC Region origin ASes announcing only one prefix: 254 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 4.9 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 247 Number of APNIC addresses announced to Internet: 44644352 Equivalent to 2 /8s, 169 /16s and 56 /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: 8094 Total ARIN prefixes after maximum aggregation: 4863 ARIN Deaggregation factor: 1.66 Prefixes being announced from the ARIN address blocks: 8136 Unique aggregates announced from the ARIN address blocks: 5461 ARIN Region origin ASes present in the Internet Routing Table: 1275 ARIN Prefixes per ASN: 6.38 ARIN Region origin ASes announcing only one prefix: 448 ARIN Region transit ASes present in the Internet Routing Table: 157 Average ARIN Region AS path length visible: 4.3 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 217 Number of ARIN addresses announced to Internet: 92115712 Equivalent to 5 /8s, 125 /16s and 147 /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: 1052 Total RIPE prefixes after maximum aggregation: 779 RIPE Deaggregation factor: 1.35 Prefixes being announced from the RIPE address blocks: 1044 Unique aggregates announced from the RIPE address blocks: 826 RIPE Region origin ASes present in the Internet Routing Table: 255 RIPE Prefixes per ASN: 4.09 RIPE Region origin ASes announcing only one prefix: 119 RIPE Region transit ASes present in the Internet Routing Table: 38 Average RIPE Region AS path length visible: 4.1 Max RIPE Region AS path length visible: 11 Number of RIPE region 32-bit ASNs visible in the Routing Table: 58 Number of RIPE addresses announced to Internet: 14867968 Equivalent to 0 /8s, 226 /16s and 222 /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: 1230 Total LACNIC prefixes after maximum aggregation: 488 LACNIC Deaggregation factor: 2.52 Prefixes being announced from the LACNIC address blocks: 1230 Unique aggregates announced from the LACNIC address blocks: 662 LACNIC Region origin ASes present in the Internet Routing Table: 135 LACNIC Prefixes per ASN: 9.11 LACNIC Region origin ASes announcing only one prefix: 58 LACNIC Region transit ASes present in the Internet Routing Table: 25 Average LACNIC Region AS path length visible: 4.6 Max LACNIC Region AS path length visible: 17 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61 Number of LACNIC addresses announced to Internet: 4062464 Equivalent to 0 /8s, 61 /16s and 253 /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: 1175 Total AfriNIC prefixes after maximum aggregation: 177 AfriNIC Deaggregation factor: 6.64 Prefixes being announced from the AfriNIC address blocks: 1174 Unique aggregates announced from the AfriNIC address blocks: 229 AfriNIC Region origin ASes present in the Internet Routing Table: 55 AfriNIC Prefixes per ASN: 21.35 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 34 Number of AfriNIC addresses announced to Internet: 2497024 Equivalent to 0 /8s, 38 /16s and 26 /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 599 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 182 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 65 37 9 UNINET-AS-AP UNINET-, TH 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 668 202 651 171 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 270 159 345 89 AS270, 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 Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 3267 80 29 69 NIKS, RU 1653 51 150 48 SUNET SUNET Swedish University Network, E 1741 39 149 18 FUNETAS, FI 3218 32 3 22 COSMOS-3218-AS AS-COSMOS root, RU 224 16 257 16 UNINETT UNINETT, The Norwegian University 8674 16 2 11 NETNOD-IX Netnod AB, SE 1880 14 1 7 STUPI, SE 8508 14 39 8 SILWEB-AS-EDU SILWEB Autonomous System - Complete listing at https://bgp.nsrc.org/REN/TENET/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/TENET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 569 82 3 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 39 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 327947 6 4 1 KNUST-, GH Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 599 2169 461 SINET-AS Research Organization of Informa 36914 569 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 1916 204 177 41 Rede Nacional de Ensino e Pesquisa, BR 668 202 651 171 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 1237 196 73 150 KREONET-AS-KR KISTI, KR 4538 188 4192 72 ERX-CERNET-BKB China Education and Resear Complete listing at https://bgp.nsrc.org/REN/TENET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 569 566 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 5786 198 197 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 173 166 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/TENET/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/TENET/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/TENET/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 /12:9 /13:17 /14:30 /15:87 /16:1475 /17:368 /18:416 /19:519 /20:750 /21:714 /22:1164 /23:1301 /24:9555 /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 545 569 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 3267 35 80 NIKS, RU 37215 33 39 MAREN, MW 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 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/TENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 4:2 5:1 6:4 8:2 12:2 14:93 23:10 24:3 35:10 37:1 38:11 40:1 41:230 42:18 44:5 45:40 47:1 49:12 50:2 52:1 58:15 59:20 60:6 61:3 62:3 63:32 64:43 65:5 66:42 67:40 68:12 69:17 70:2 71:1 72:8 74:51 76:25 77:7 80:4 81:1 82:3 83:2 84:2 85:20 86:6 87:1 89:2 91:16 92:2 93:1 96:5 97:1 98:2 101:3 102:13 103:359 104:76 108:10 109:6 110:1 111:5 113:1 114:21 116:8 117:61 118:34 119:31 121:12 122:8 123:8 124:42 125:5 128:57 129:33 130:96 131:59 132:65 133:156 134:112 136:199 137:50 138:11 139:5 140:32 141:3 142:27 143:24 144:40 145:1 146:137 147:51 148:200 149:11 150:36 151:8 152:136 153:3 154:40 155:88 156:127 157:25 158:29 159:116 160:34 161:31 162:24 163:72 164:10 165:43 167:12 168:102 169:6 170:19 171:1 172:1 173:5 175:16 177:4 179:13 180:16 181:1 182:12 184:8 185:21 186:4 187:24 188:4 189:2 190:17 191:13 192:1127 193:68 194:59 195:33 196:148 197:353 198:463 199:274 200:298 201:22 202:631 203:441 204:374 205:133 206:203 207:219 208:64 209:84 210:221 211:4 212:118 213:1 214:10 216:90 217:4 218:23 219:7 220:16 222:4 223:16 End of report