IPv4 R&E Routing Table Report 18:30 GMT Tue 25 Mar, 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: 16275 Prefixes after maximum aggregation (per Origin AS): 8381 Deaggregation factor: 1.94 Unique aggregates announced (without unneeded subnets): 9565 Number of IPv4 prefixes with a valid ROA: 5886 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 10387 Total ASes present in the Internet Routing Table: 2264 Prefixes per ASN: 7.19 Origin-only ASes present in the Internet Routing Table: 1979 Origin ASes announcing only one prefix: 838 Transit ASes present in the Internet Routing Table: 285 Transit-only ASes present in the Internet Routing Table: 56 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 1 Number of instances of unregistered ASNs: 1 Number of 32-bit ASNs allocated by the RIRs: 46134 Number of 32-bit ASNs visible in the Routing Table: 556 Prefixes from 32-bit ASNs in the Routing Table: 1549 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: 157848576 Equivalent to 9 /8s, 104 /16s and 148 /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: 1725 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4869 Total APNIC prefixes after maximum aggregation: 2312 APNIC Deaggregation factor: 2.11 Prefixes being announced from the APNIC address blocks: 4868 Unique aggregates announced from the APNIC address blocks: 2649 APNIC Region origin ASes present in the Internet Routing Table: 598 APNIC Prefixes per ASN: 8.14 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 5.1 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 241 Number of APNIC addresses announced to Internet: 45587200 Equivalent to 2 /8s, 183 /16s and 155 /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: 8193 Total ARIN prefixes after maximum aggregation: 4835 ARIN Deaggregation factor: 1.69 Prefixes being announced from the ARIN address blocks: 8200 Unique aggregates announced from the ARIN address blocks: 5400 ARIN Region origin ASes present in the Internet Routing Table: 1274 ARIN Prefixes per ASN: 6.44 ARIN Region origin ASes announcing only one prefix: 445 ARIN Region transit ASes present in the Internet Routing Table: 162 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: 92205312 Equivalent to 5 /8s, 126 /16s and 241 /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: 850 Total RIPE prefixes after maximum aggregation: 603 RIPE Deaggregation factor: 1.41 Prefixes being announced from the RIPE address blocks: 843 Unique aggregates announced from the RIPE address blocks: 650 RIPE Region origin ASes present in the Internet Routing Table: 177 RIPE Prefixes per ASN: 4.76 RIPE Region origin ASes announcing only one prefix: 77 RIPE Region transit ASes present in the Internet Routing Table: 24 Average RIPE Region AS path length visible: 4.5 Max RIPE Region AS path length visible: 11 Number of RIPE region 32-bit ASNs visible in the Routing Table: 29 Number of RIPE addresses announced to Internet: 13777664 Equivalent to 0 /8s, 210 /16s and 59 /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: 1287 Total LACNIC prefixes after maximum aggregation: 492 LACNIC Deaggregation factor: 2.62 Prefixes being announced from the LACNIC address blocks: 1287 Unique aggregates announced from the LACNIC address blocks: 676 LACNIC Region origin ASes present in the Internet Routing Table: 137 LACNIC Prefixes per ASN: 9.39 LACNIC Region origin ASes announcing only one prefix: 59 LACNIC Region transit ASes present in the Internet Routing Table: 24 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: 4082176 Equivalent to 0 /8s, 62 /16s and 74 /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: 1075 Total AfriNIC prefixes after maximum aggregation: 138 AfriNIC Deaggregation factor: 7.79 Prefixes being announced from the AfriNIC address blocks: 1075 Unique aggregates announced from the AfriNIC address blocks: 188 AfriNIC Region origin ASes present in the Internet Routing Table: 21 AfriNIC Prefixes per ASN: 51.19 AfriNIC Region origin ASes announcing only one prefix: 9 AfriNIC Region transit ASes present in the Internet Routing Table: 7 Average AfriNIC Region AS path length visible: 3.7 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7 Number of AfriNIC addresses announced to Internet: 2195712 Equivalent to 0 /8s, 33 /16s and 129 /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 624 2170 464 SINET-AS Research Organization of Informa 7497 452 180 24 CSTNET-AS-AP Computer Network Information 4538 195 4192 73 ERX-CERNET-BKB China Education and Resear 1237 194 74 146 KREONET-AS-KR KISTI, KR 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 297 117 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/TENET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 668 211 647 179 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 2152 149 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 270 117 328 81 AS270, 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 108 24 5 ISU Internet Services Unit ISU, SA 1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 3267 79 29 69 NIKS, RU 1653 50 150 48 SUNET SUNET Swedish University Network, E 1741 39 149 18 FUNETAS, FI 3218 39 3 24 COSMOS-3218-AS AS-COSMOS root, RU 8674 16 2 11 NETNOD-IX Netnod AB, SE 1880 14 1 7 STUPI, SE 224 13 256 13 UNINETT UNINETT, The Norwegian University 1101 12 465 12 IP-EEND-AS IP-EEND BV, NL 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 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 52 Red Universitaria Nacional, CL 271640 67 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 544 82 3 KENET-AS, KE 2018 374 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA 327798 4 0 3 BERNET, BI 329522 4 1 2 SANSA, 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 624 2170 464 SINET-AS Research Organization of Informa 36914 544 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 2018 374 318 69 TENET-1, ZA 1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 668 211 647 179 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 4538 195 4192 73 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 544 541 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 2018 374 305 TENET-1, ZA 5786 199 198 UPRENET, PR 1916 236 195 Rede Nacional de Ensino e Pesquisa, BR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 173 166 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 147 126 NKN-CORE-NW NKN Core Network, IN 4538 195 122 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 Complete listing at https://bgp.nsrc.org/REN/TENET/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/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 /16:1471 /17:361 /18:411 /19:490 /20:735 /21:677 /22:1113 /23:1276 /24:9593 /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 520 544 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 23024 38 99 OCDE, US 3267 35 79 NIKS, RU 32440 33 57 LONI, US 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 Complete listing at https://bgp.nsrc.org/REN/TENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 4:2 6:4 8:2 12:2 14:93 23:9 24:3 35:14 38:11 40:1 41:206 42:18 44:3 45:41 47:1 49:8 50:2 52:1 58:15 59:20 60:6 61:3 62:3 63:32 64:42 65:5 66:41 67:39 68:10 69:16 70:2 71:1 72:8 74:50 76:34 77:8 80:4 82:3 83:1 84:1 85:20 86:5 87:1 89:1 91:6 92:2 93:1 96:5 97:1 98:2 101:3 102:2 103:362 104:79 108:10 109:4 111:21 113:1 114:24 116:9 117:61 118:34 119:30 121:28 122:8 123:8 124:42 125:5 128:55 129:30 130:97 131:58 132:66 133:157 134:105 136:200 137:46 138:58 139:5 140:33 141:4 142:26 143:24 144:25 146:136 147:54 148:191 149:11 150:69 151:9 152:139 153:3 154:38 155:84 156:129 157:26 158:29 159:116 160:34 161:16 162:25 163:61 164:11 165:48 167:13 168:103 169:7 170:20 171:1 172:2 173:5 175:16 177:7 179:13 180:16 181:1 182:12 184:7 185:14 186:3 187:24 188:3 189:5 190:17 191:13 192:1104 193:63 194:54 195:30 196:146 197:334 198:483 199:279 200:297 201:38 202:636 203:438 204:374 205:138 206:210 207:224 208:67 209:118 210:224 211:4 212:104 214:10 216:91 218:23 219:6 220:17 222:4 223:15 End of report