IPv4 R&E Routing Table Report 18:30 GMT Wed 16 Jul, 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: 16395 Prefixes after maximum aggregation (per Origin AS): 8581 Deaggregation factor: 1.91 Unique aggregates announced (without unneeded subnets): 9758 Number of IPv4 prefixes with a valid ROA: 6455 Number of IPv4 prefixes with an invalid ROA: 8 Number of IPv4 prefixes with no ROA: 9932 Total ASes present in the Internet Routing Table: 2371 Prefixes per ASN: 6.91 Origin-only ASes present in the Internet Routing Table: 2066 Origin ASes announcing only one prefix: 901 Transit ASes present in the Internet Routing Table: 305 Transit-only ASes present in the Internet Routing Table: 61 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: 18 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: 46838 Number of 32-bit ASNs visible in the Routing Table: 615 Prefixes from 32-bit ASNs in the Routing Table: 1632 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: 158913280 Equivalent to 9 /8s, 120 /16s and 211 /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: 1844 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4822 Total APNIC prefixes after maximum aggregation: 2337 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4820 Unique aggregates announced from the APNIC address blocks: 2664 APNIC Region origin ASes present in the Internet Routing Table: 600 APNIC Prefixes per ASN: 8.03 APNIC Region origin ASes announcing only one prefix: 255 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 5.0 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: 45368064 Equivalent to 2 /8s, 180 /16s and 67 /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: 8057 Total ARIN prefixes after maximum aggregation: 4816 ARIN Deaggregation factor: 1.67 Prefixes being announced from the ARIN address blocks: 8102 Unique aggregates announced from the ARIN address blocks: 5398 ARIN Region origin ASes present in the Internet Routing Table: 1272 ARIN Prefixes per ASN: 6.37 ARIN Region origin ASes announcing only one prefix: 441 ARIN Region transit ASes present in the Internet Routing Table: 158 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: 214 Number of ARIN addresses announced to Internet: 92272128 Equivalent to 5 /8s, 127 /16s and 246 /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: 1036 Total RIPE prefixes after maximum aggregation: 760 RIPE Deaggregation factor: 1.36 Prefixes being announced from the RIPE address blocks: 1027 Unique aggregates announced from the RIPE address blocks: 808 RIPE Region origin ASes present in the Internet Routing Table: 249 RIPE Prefixes per ASN: 4.12 RIPE Region origin ASes announcing only one prefix: 120 RIPE Region transit ASes present in the Internet Routing Table: 38 Average RIPE Region AS path length visible: 4.0 Max RIPE Region AS path length visible: 10 Number of RIPE region 32-bit ASNs visible in the Routing Table: 56 Number of RIPE addresses announced to Internet: 14752256 Equivalent to 0 /8s, 225 /16s and 26 /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: 1295 Total LACNIC prefixes after maximum aggregation: 499 LACNIC Deaggregation factor: 2.60 Prefixes being announced from the LACNIC address blocks: 1292 Unique aggregates announced from the LACNIC address blocks: 684 LACNIC Region origin ASes present in the Internet Routing Table: 136 LACNIC Prefixes per ASN: 9.50 LACNIC Region origin ASes announcing only one prefix: 57 LACNIC Region transit ASes present in the Internet Routing Table: 26 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 63 Number of LACNIC addresses announced to Internet: 4078080 Equivalent to 0 /8s, 62 /16s and 58 /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: 1152 Total AfriNIC prefixes after maximum aggregation: 164 AfriNIC Deaggregation factor: 7.02 Prefixes being announced from the AfriNIC address blocks: 1151 Unique aggregates announced from the AfriNIC address blocks: 201 AfriNIC Region origin ASes present in the Internet Routing Table: 51 AfriNIC Prefixes per ASN: 22.57 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 12 Average AfriNIC Region AS path length visible: 3.6 Max AfriNIC Region AS path length visible: 18 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 35 Number of AfriNIC addresses announced to Internet: 2440192 Equivalent to 0 /8s, 37 /16s and 60 /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 601 2169 462 SINET-AS Research Organization of Informa 7497 453 180 23 CSTNET-AS-AP Computer Network Information 4538 197 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 172 281 116 AARNET-AS-AP Australian Academic and Rese 55824 148 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 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 668 211 648 180 DNIC-AS-00668, US 376 199 162 150 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 176 34 7 LACOE, US 270 159 345 89 AS270, US 2152 146 491 96 CENIC-2152, US 18558 138 18 4 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 23024 99 7 17 OCDE, US 21976 90 34 16 NJEDGE-NET, 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 109 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 34 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 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 2715 55 100 37 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 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 570 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 37 8 1 MAREN, MW 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 8 4 1 KNUST-, GH 37661 6 6 3 NRaE1-AS, NG 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 601 2169 462 SINET-AS Research Organization of Informa 36914 570 82 3 KENET-AS, KE 7497 453 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR 668 211 648 180 DNIC-AS-00668, US 376 199 162 150 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 4538 197 4192 72 ERX-CERNET-BKB China Education and Resear 1237 194 74 146 KREONET-AS-KR KISTI, KR 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 570 567 KENET-AS, KE 7497 453 430 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 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 176 169 LACOE, US 18558 138 134 NETBLK-RCOEK, US 55824 148 127 NKN-CORE-NW NKN Core Network, IN 4538 197 125 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 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 /12:10 /13:18 /14:30 /15:87 /16:1474 /17:367 /18:426 /19:511 /20:761 /21:723 /22:1143 /23:1291 /24:9551 /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 546 570 KENET-AS, KE 8895 106 109 ISU Internet Services Unit ISU, SA 23024 38 99 OCDE, US 3267 35 80 NIKS, RU 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 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 41:226 42:18 44:4 45:42 47:1 49:12 50:2 52:1 58:16 59:20 60:6 61:3 62:3 63:32 64:43 65:5 66:56 67:39 68:12 69:17 70:2 71:1 72:8 74:50 76:15 77:7 80:4 81:1 82:3 83:2 84:2 85:20 86:6 87:1 89:2 91:14 92:2 93:1 96:5 97:1 98:2 101:3 102:12 103:364 104:72 108:10 109:5 110:1 111:21 113:1 114:21 116:8 117:61 118:34 119:31 121:28 122:8 123:8 124:42 125:5 128:57 129:33 130:96 131:58 132:68 133:156 134:109 136:200 137:48 138:10 139:5 140:31 141:4 142:26 143:25 144:25 146:135 147:51 148:200 149:10 150:37 151:8 152:140 153:3 154:42 155:85 156:132 157:25 158:26 159:116 160:34 161:17 162:24 163:78 164:10 165:43 167:12 168:96 169:8 170:17 171:1 172:1 173:6 175:16 177:5 179:13 180:16 181:1 182:12 184:7 185:18 186:4 187:24 188:4 189:2 190:17 191:13 192:1114 193:71 194:58 195:9 196:148 197:352 198:455 199:279 200:304 201:39 202:629 203:422 204:370 205:134 206:203 207:220 208:64 209:117 210:222 211:4 212:119 213:1 214:10 216:93 217:4 218:23 219:7 220:16 222:4 223:16 End of report