IPv4 R&E Routing Table Report 18:30 GMT Fri 20 Jun, 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: 16475 Prefixes after maximum aggregation (per Origin AS): 8593 Deaggregation factor: 1.92 Unique aggregates announced (without unneeded subnets): 9771 Number of IPv4 prefixes with a valid ROA: 6313 Number of IPv4 prefixes with an invalid ROA: 4 Number of IPv4 prefixes with no ROA: 10158 Total ASes present in the Internet Routing Table: 2386 Prefixes per ASN: 6.90 Origin-only ASes present in the Internet Routing Table: 2081 Origin ASes announcing only one prefix: 899 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: 46692 Number of 32-bit ASNs visible in the Routing Table: 617 Prefixes from 32-bit ASNs in the Routing Table: 1641 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: 159123456 Equivalent to 9 /8s, 124 /16s and 8 /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: 1860 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4812 Total APNIC prefixes after maximum aggregation: 2316 APNIC Deaggregation factor: 2.08 Prefixes being announced from the APNIC address blocks: 4810 Unique aggregates announced from the APNIC address blocks: 2644 APNIC Region origin ASes present in the Internet Routing Table: 606 APNIC Prefixes per ASN: 7.94 APNIC Region origin ASes announcing only one prefix: 257 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 4.8 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 246 Number of APNIC addresses announced to Internet: 45592832 Equivalent to 2 /8s, 183 /16s and 177 /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: 8103 Total ARIN prefixes after maximum aggregation: 4823 ARIN Deaggregation factor: 1.68 Prefixes being announced from the ARIN address blocks: 8144 Unique aggregates announced from the ARIN address blocks: 5387 ARIN Region origin ASes present in the Internet Routing Table: 1274 ARIN Prefixes per ASN: 6.39 ARIN Region origin ASes announcing only one prefix: 439 ARIN Region transit ASes present in the Internet Routing Table: 155 Average ARIN Region AS path length visible: 4.2 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: 92115456 Equivalent to 5 /8s, 125 /16s and 146 /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: 1053 Total RIPE prefixes after maximum aggregation: 777 RIPE Deaggregation factor: 1.36 Prefixes being announced from the RIPE address blocks: 1045 Unique aggregates announced from the RIPE address blocks: 827 RIPE Region origin ASes present in the Internet Routing Table: 253 RIPE Prefixes per ASN: 4.13 RIPE Region origin ASes announcing only one prefix: 117 RIPE Region transit ASes present in the Internet Routing Table: 38 Average RIPE Region AS path length visible: 4.2 Max RIPE Region AS path length visible: 11 Number of RIPE region 32-bit ASNs visible in the Routing Table: 56 Number of RIPE addresses announced to Internet: 14802176 Equivalent to 0 /8s, 225 /16s and 221 /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: 496 LACNIC Deaggregation factor: 2.61 Prefixes being announced from the LACNIC address blocks: 1295 Unique aggregates announced from the LACNIC address blocks: 681 LACNIC Region origin ASes present in the Internet Routing Table: 136 LACNIC Prefixes per ASN: 9.52 LACNIC Region origin ASes announcing only one prefix: 58 LACNIC Region transit ASes present in the Internet Routing Table: 27 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 11 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 4081664 Equivalent to 0 /8s, 62 /16s and 72 /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: 1179 Total AfriNIC prefixes after maximum aggregation: 176 AfriNIC Deaggregation factor: 6.70 Prefixes being announced from the AfriNIC address blocks: 1178 Unique aggregates announced from the AfriNIC address blocks: 229 AfriNIC Region origin ASes present in the Internet Routing Table: 54 AfriNIC Prefixes per ASN: 21.81 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 13 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: 36 Number of AfriNIC addresses announced to Internet: 2528768 Equivalent to 0 /8s, 38 /16s and 150 /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 2170 464 SINET-AS Research Organization of Informa 7497 454 180 23 CSTNET-AS-AP Computer Network Information 4538 196 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 173 281 117 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 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 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 376 200 162 150 RISQ-AS, CA 5786 200 16 1 UPRENET, PR 2920 176 34 7 LACOE, US 270 158 345 88 AS270, US 2152 146 491 96 CENIC-2152, US 18558 139 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 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 3267 80 29 69 NIKS, RU 1653 50 150 48 SUNET SUNET Swedish University Network, E 1741 39 149 18 FUNETAS, FI 3218 35 3 23 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 241 177 40 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 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 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 566 82 3 KENET-AS, KE 2018 375 318 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 37661 9 6 3 NRaE1-AS, NG 36982 8 33 8 UCT, ZA 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 598 2170 464 SINET-AS Research Organization of Informa 36914 566 82 3 KENET-AS, KE 7497 454 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 241 177 40 Rede Nacional de Ensino e Pesquisa, BR 668 211 648 180 DNIC-AS-00668, US 376 200 162 150 RISQ-AS, CA 5786 200 16 1 UPRENET, PR 4538 196 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 566 563 KENET-AS, KE 7497 454 431 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 1916 241 201 Rede Nacional de Ensino e Pesquisa, BR 5786 200 199 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 176 169 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 148 127 NKN-CORE-NW NKN Core Network, IN 4538 196 124 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 /16:1476 /17:370 /18:431 /19:520 /20:766 /21:726 /22:1153 /23:1296 /24:9589 /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 542 566 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 32440 31 54 LONI, US 37215 31 37 MAREN, MW 25977 30 44 HCCS, US 27609 29 45 USC-UNIVERSITY-HOSPITAL, 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 35:15 37:1 38:11 40:1 41:224 42:18 44:4 45:43 47:1 49:12 50:3 52:1 58:16 59:20 60:6 61:3 62:3 63:32 64:43 65:5 66:41 67:39 68:12 69:17 70:2 71:1 72:8 74:50 76:34 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 98:2 101:3 102:13 103:364 104:79 108:10 109:4 110:1 111:21 113:1 114:24 116:9 117:61 118:34 119:31 121:28 122:8 123:8 124:42 125:5 128:53 129:33 130:96 131:58 132:68 133:156 134:108 136:200 137:47 138:10 139:5 140:31 141:4 142:27 143:26 144:7 145:1 146:137 147:51 148:200 149:10 150:37 151:9 152:138 153:3 154:45 155:85 156:132 157:26 158:29 159:116 160:34 161:17 162:24 163:73 164:10 165:43 167:12 168:103 169:7 170:19 171:1 172:2 173:6 175:16 177:5 179:13 180:16 181:1 182:12 184:7 185:22 186:3 187:25 188:3 189:5 190:17 191:13 192:1119 193:72 194:59 195:33 196:149 197:350 198:459 199:280 200:304 201:39 202:601 203:442 204:371 205:135 206:203 207:219 208:67 209:117 210:210 211:4 212:119 213:1 214:10 216:92 217:4 218:23 219:7 220:16 222:4 223:17 End of report