IPv4 R&E Routing Table Report 17:15 GMT Wed 12 Mar, 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: 18550 Prefixes after maximum aggregation (per Origin AS): 10283 Deaggregation factor: 1.80 Unique aggregates announced (without unneeded subnets): 11363 Number of IPv4 prefixes with a valid ROA: 7347 Number of IPv4 prefixes with an invalid ROA: 2 Number of IPv4 prefixes with no ROA: 11201 Total ASes present in the Internet Routing Table: 2670 Prefixes per ASN: 6.95 Origin-only ASes present in the Internet Routing Table: 2325 Origin ASes announcing only one prefix: 1027 Transit ASes present in the Internet Routing Table: 345 Transit-only ASes present in the Internet Routing Table: 49 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.8 Max AS path length visible: 20 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: 46160 Number of 32-bit ASNs visible in the Routing Table: 669 Prefixes from 32-bit ASNs in the Routing Table: 1835 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: 198845184 Equivalent to 11 /8s, 218 /16s and 35 /24s Percentage of available address space announced: 5.4 Percentage of allocated address space announced: 5.4 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: 2067 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4717 Total APNIC prefixes after maximum aggregation: 2286 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4716 Unique aggregates announced from the APNIC address blocks: 2617 APNIC Region origin ASes present in the Internet Routing Table: 593 APNIC Prefixes per ASN: 7.95 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 4.7 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 239 Number of APNIC addresses announced to Internet: 45555968 Equivalent to 2 /8s, 183 /16s and 33 /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: 8026 Total ARIN prefixes after maximum aggregation: 4688 ARIN Deaggregation factor: 1.71 Prefixes being announced from the ARIN address blocks: 8042 Unique aggregates announced from the ARIN address blocks: 5207 ARIN Region origin ASes present in the Internet Routing Table: 1250 ARIN Prefixes per ASN: 6.43 ARIN Region origin ASes announcing only one prefix: 440 ARIN Region transit ASes present in the Internet Routing Table: 150 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 208 Number of ARIN addresses announced to Internet: 90311680 Equivalent to 5 /8s, 98 /16s and 12 /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: 3232 Total RIPE prefixes after maximum aggregation: 2608 RIPE Deaggregation factor: 1.24 Prefixes being announced from the RIPE address blocks: 3220 Unique aggregates announced from the RIPE address blocks: 2627 RIPE Region origin ASes present in the Internet Routing Table: 578 RIPE Prefixes per ASN: 5.57 RIPE Region origin ASes announcing only one prefix: 260 RIPE Region transit ASes present in the Internet Routing Table: 98 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: 132 Number of RIPE addresses announced to Internet: 56498176 Equivalent to 3 /8s, 94 /16s and 24 /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: 1446 Total LACNIC prefixes after maximum aggregation: 531 LACNIC Deaggregation factor: 2.72 Prefixes being announced from the LACNIC address blocks: 1442 Unique aggregates announced from the LACNIC address blocks: 695 LACNIC Region origin ASes present in the Internet Routing Table: 151 LACNIC Prefixes per ASN: 9.55 LACNIC Region origin ASes announcing only one prefix: 50 LACNIC Region transit ASes present in the Internet Routing Table: 22 Average LACNIC Region AS path length visible: 5.7 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 4066304 Equivalent to 0 /8s, 62 /16s and 12 /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: 1128 Total AfriNIC prefixes after maximum aggregation: 169 AfriNIC Deaggregation factor: 6.67 Prefixes being announced from the AfriNIC address blocks: 1127 Unique aggregates announced from the AfriNIC address blocks: 214 AfriNIC Region origin ASes present in the Internet Routing Table: 48 AfriNIC Prefixes per ASN: 23.48 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 4.5 Max AfriNIC Region AS path length visible: 20 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 2410496 Equivalent to 0 /8s, 36 /16s and 200 /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 1237 192 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 146 19 20 NKN-CORE-NW NKN Core Network, IN 4538 140 4192 70 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 4621 60 35 8 UNINET-AS-AP UNINET-, TH 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 668 202 646 172 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 198 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 23024 99 7 17 OCDE, US 21976 88 34 14 NJEDGE-NET, US 237 86 542 51 MERIT-AS-14, US 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 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 786 193 1747 185 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 96 1487 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 90 26 70 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 64 630 59 FR-RENATER Reseau National de telecommuni 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 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 109 25 52 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 4270 53 16 1 Red de Interconexion Universitaria, AR 61468 53 5 17 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 46 99 35 Fundacao Carlos Chagas Filho de Amparo a 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 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 36914 537 82 3 KENET-AS, KE 2018 380 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 8 4 NRaE1-AS, NG 37501 11 49 6 UOFS, ZA 327700 10 16 1 MoRENet, MZ 36982 8 33 8 UCT, ZA 37654 8 1 5 RwEdNet-AS, RW 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 624 2170 464 SINET-AS Research Organization of Informa 36914 537 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 2018 380 319 71 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 668 202 646 172 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 786 193 1747 185 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/Janet/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 537 534 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 2018 380 309 TENET-1, ZA 5786 198 197 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 146 126 NKN-CORE-NW NKN Core Network, IN 8895 108 103 ISU Internet Services Unit ISU, SA 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 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, 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 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 /9:1 /10:1 /11:1 /12:10 /13:18 /14:35 /15:115 /16:1982 /17:410 /18:447 /19:563 /20:820 /21:852 /22:1354 /23:1476 /24:10465 /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 513 537 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 23024 38 99 OCDE, US 32440 33 57 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 25977 30 44 HCCS, US 200521 30 55 SEAP-AGE, ES 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 40326 29 33 ECKERD-COLLEGE, US Complete listing at https://bgp.nsrc.org/REN/Janet/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:15 6:4 8:2 12:1 14:93 23:8 24:2 31:1 35:9 37:8 38:10 40:1 41:216 42:6 44:4 45:39 46:4 47:1 49:12 50:2 59:19 60:6 61:3 62:6 63:32 64:43 65:5 66:34 67:39 68:10 69:17 70:2 71:1 72:8 74:53 76:34 77:6 78:3 79:10 80:4 81:24 82:3 83:7 84:7 85:30 87:1 89:10 91:39 93:13 94:2 95:2 96:5 97:1 98:2 102:6 103:359 104:79 108:8 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:30 121:27 122:8 123:8 124:42 128:57 129:38 130:95 131:64 132:66 133:157 134:110 136:199 137:51 138:58 139:11 140:33 141:3 142:42 143:25 144:25 145:2 146:110 147:54 148:198 149:12 150:69 151:8 152:129 153:14 154:45 155:63 156:135 157:25 158:30 159:117 160:34 161:16 162:23 163:63 164:11 165:48 167:10 168:119 169:7 170:95 172:2 173:6 175:16 177:6 179:13 180:16 181:1 182:12 184:6 185:40 186:3 187:24 188:12 189:3 190:33 191:13 192:1418 193:257 194:103 195:75 196:148 197:326 198:465 199:277 200:332 201:36 202:631 203:432 204:372 205:136 206:210 207:224 208:62 209:118 210:223 211:3 212:144 213:4 214:8 216:91 217:12 218:2 219:6 220:16 222:3 223:15 End of report