IPv4 R&E Routing Table Report 17:15 GMT Thu 16 Oct, 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: 12711 Prefixes after maximum aggregation (per Origin AS): 7350 Deaggregation factor: 1.73 Unique aggregates announced (without unneeded subnets): 8127 Number of IPv4 prefixes with a valid ROA: 6235 Number of IPv4 prefixes with an invalid ROA: 3 Number of IPv4 prefixes with no ROA: 6473 Total ASes present in the Internet Routing Table: 1852 Prefixes per ASN: 6.86 Origin-only ASes present in the Internet Routing Table: 1608 Origin ASes announcing only one prefix: 764 Transit ASes present in the Internet Routing Table: 244 Transit-only ASes present in the Internet Routing Table: 40 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 17 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: 47721 Number of 32-bit ASNs visible in the Routing Table: 522 Prefixes from 32-bit ASNs in the Routing Table: 1349 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: 4 Number of addresses announced to Internet: 128228096 Equivalent to 7 /8s, 164 /16s and 155 /24s Percentage of available address space announced: 3.5 Percentage of allocated address space announced: 3.5 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: 1556 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4619 Total APNIC prefixes after maximum aggregation: 2245 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4615 Unique aggregates announced from the APNIC address blocks: 2529 APNIC Region origin ASes present in the Internet Routing Table: 556 APNIC Prefixes per ASN: 8.30 APNIC Region origin ASes announcing only one prefix: 237 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 16 Number of APNIC region 32-bit ASNs visible in the Routing Table: 232 Number of APNIC addresses announced to Internet: 42141440 Equivalent to 2 /8s, 131 /16s and 7 /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: 2581 Total ARIN prefixes after maximum aggregation: 1714 ARIN Deaggregation factor: 1.51 Prefixes being announced from the ARIN address blocks: 2598 Unique aggregates announced from the ARIN address blocks: 1999 ARIN Region origin ASes present in the Internet Routing Table: 433 ARIN Prefixes per ASN: 6.00 ARIN Region origin ASes announcing only one prefix: 153 ARIN Region transit ASes present in the Internet Routing Table: 48 Average ARIN Region AS path length visible: 5.0 Max ARIN Region AS path length visible: 17 Number of ARIN region 32-bit ASNs visible in the Routing Table: 63 Number of ARIN addresses announced to Internet: 23571456 Equivalent to 1 /8s, 103 /16s and 172 /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: 3675 Total RIPE prefixes after maximum aggregation: 2906 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3661 Unique aggregates announced from the RIPE address blocks: 2985 RIPE Region origin ASes present in the Internet Routing Table: 670 RIPE Prefixes per ASN: 5.46 RIPE Region origin ASes announcing only one prefix: 303 RIPE Region transit ASes present in the Internet Routing Table: 110 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: 153 Number of RIPE addresses announced to Internet: 56971776 Equivalent to 3 /8s, 101 /16s and 82 /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: 900 Total LACNIC prefixes after maximum aggregation: 327 LACNIC Deaggregation factor: 2.75 Prefixes being announced from the LACNIC address blocks: 899 Unique aggregates announced from the LACNIC address blocks: 416 LACNIC Region origin ASes present in the Internet Routing Table: 109 LACNIC Prefixes per ASN: 8.25 LACNIC Region origin ASes announcing only one prefix: 49 LACNIC Region transit ASes present in the Internet Routing Table: 16 Average LACNIC Region AS path length visible: 5.0 Max LACNIC Region AS path length visible: 10 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 51 Number of LACNIC addresses announced to Internet: 3071488 Equivalent to 0 /8s, 46 /16s and 222 /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: 935 Total AfriNIC prefixes after maximum aggregation: 157 AfriNIC Deaggregation factor: 5.96 Prefixes being announced from the AfriNIC address blocks: 934 Unique aggregates announced from the AfriNIC address blocks: 194 AfriNIC Region origin ASes present in the Internet Routing Table: 43 AfriNIC Prefixes per ASN: 21.72 AfriNIC Region origin ASes announcing only one prefix: 22 AfriNIC Region transit ASes present in the Internet Routing Table: 6 Average AfriNIC Region AS path length visible: 4.6 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 23 Number of AfriNIC addresses announced to Internet: 2469120 Equivalent to 0 /8s, 37 /16s and 173 /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 198 72 153 KREONET-AS-KR KISTI, KR 4538 187 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 113 AARNET-AS-AP Australian Academic and Rese 55824 151 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 59 698 33 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 21976 88 34 14 NJEDGE-NET, US 22742 70 37 32 CT-EDU-NET, US 271 63 26 48 BCNET-AS, CA 15296 63 5 54 CYBERA, CA 270 62 90 27 AS270, US 611 46 84 31 NECN-1-611, CA 27609 45 5 21 USC-UNIVERSITY-HOSPITAL, US 393249 44 71 36 UBC, CA 16796 42 19 15 MERLIN-NET, CA 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 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 212 1736 187 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 99 1503 84 SURFNET-NL SURFnet, The Netherlands, NL 3267 92 30 73 NIKS, RU 2614 88 26 68 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 77 88 72 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 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 205 177 41 Rede Nacional de Ensino e Pesquisa, BR 11340 111 25 50 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 61468 51 3 21 CEDIA, EC 2715 50 84 38 Fundacao Carlos Chagas Filho de Amparo a 19611 49 17 2 Associacao Antonio Vieira - Unisinos, BR 28614 38 2 2 Fundacao Universidade Regional de Blumena 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 20191 26 16 1 Pontificia Universidad Catolica de Chile, 28027 14 2 5 Escuela Superior Politecnica del Litoral, 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 2018 375 318 69 TENET-1, ZA 36914 368 82 3 KENET-AS, KE 8094 47 48 18 PUKNET, ZA 37215 41 8 1 MAREN, MW 327700 12 16 1 MoRENet, MZ 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA 327947 5 4 1 KNUST-, GH 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 599 2169 461 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 36914 368 82 3 KENET-AS, KE 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 212 1736 187 JANET Jisc Services Limited, GB 1916 205 177 41 Rede Nacional de Ensino e Pesquisa, BR 376 200 162 150 RISQ-AS, CA 1237 198 72 153 KREONET-AS-KR KISTI, KR 4538 187 4192 72 ERX-CERNET-BKB China Education and Resear Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 36914 368 365 KENET-AS, KE 2018 375 306 TENET-1, ZA 58647 182 180 KAGAWAU-AS Kagawa University, JP 1916 205 164 Rede Nacional de Ensino e Pesquisa, BR 55824 151 130 NKN-CORE-NW NKN Core Network, IN 4538 187 115 ERX-CERNET-BKB China Education and Research Net 8895 108 103 ISU Internet Services Unit ISU, SA 21976 88 74 NJEDGE-NET, US 4762 75 74 MAHIDOL-BORDER-AS Mahidol University, Thailand, 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 64011 UNALLOCATED 130.215.0.0/16 10326 WPI, 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 203.17.179.0/24 Origin: 7575 AARNET-AS-AP Australian Academic and Res 203.17.179.0/24 Transit: 24490 TEIN2-SG-AP Trans-Eurasia Information Ne 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 /9:0 /10:0 /11:0 /12:9 /13:16 /14:28 /15:100 /16:1331 /17:253 /18:245 /19:330 /20:534 /21:656 /22:1001 /23:1095 /24:7112 /25:0 /26:1 /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 345 368 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 31638 48 48 ASN-LEPIDA, IT 3267 42 92 NIKS, RU 37215 35 41 MAREN, MW 200521 34 59 SEAP-AGE, ES 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 36794 24 26 META SOLUTIONS PIKETON, US 61468 24 51 CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/Janet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:19 8:1 14:95 23:2 24:2 31:1 35:1 37:26 38:3 41:190 42:15 44:6 45:43 46:4 49:9 58:15 59:20 60:6 61:3 62:8 63:29 64:21 65:5 66:14 67:1 69:2 70:2 72:3 74:5 77:9 78:3 79:9 80:11 81:27 82:8 83:6 84:16 85:49 86:8 87:1 89:16 91:38 92:2 93:14 94:2 95:2 96:5 98:2 101:3 102:9 103:337 104:1 109:2 110:1 111:3 113:1 114:22 116:7 117:61 118:33 119:30 121:12 122:8 123:8 124:42 125:3 128:5 129:14 130:71 131:45 132:6 133:158 134:47 136:9 137:10 138:10 139:3 140:6 142:30 143:21 144:24 145:13 146:134 147:15 148:6 149:9 150:17 151:1 152:44 153:11 154:40 155:56 156:12 157:24 158:29 159:110 160:31 161:9 162:7 163:27 164:3 165:38 167:7 168:61 170:4 175:15 177:4 179:12 180:16 182:11 184:13 185:47 186:3 187:22 188:23 190:16 191:13 192:1007 193:297 194:138 195:69 196:149 197:193 198:203 199:137 200:276 201:20 202:589 203:432 204:85 205:73 206:108 207:74 208:27 209:40 210:219 211:4 212:149 213:7 216:30 217:24 218:3 219:7 220:16 222:4 223:6 End of report