IPv4 R&E Routing Table Report 17:00 GMT Fri 14 Mar, 2025 IPv4 BGP Table (R&E) as seen at GEANT. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/GEANT/ Analysis Summary ---------------- BGP routing table entries examined: 19275 Prefixes after maximum aggregation (per Origin AS): 10677 Deaggregation factor: 1.81 Unique aggregates announced (without unneeded subnets): 11799 Number of IPv4 prefixes with a valid ROA: 7699 Number of IPv4 prefixes with an invalid ROA: 13 Number of IPv4 prefixes with no ROA: 11563 Total ASes present in the Internet Routing Table: 2788 Prefixes per ASN: 6.91 Origin-only ASes present in the Internet Routing Table: 2432 Origin ASes announcing only one prefix: 1071 Transit ASes present in the Internet Routing Table: 356 Transit-only ASes present in the Internet Routing Table: 53 Paths with bogon ASNs present in the IPv4 Routing Table: 6 Average AS path length visible in the Internet Routing Table: 3.8 Max AS path length visible: 19 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 7 Number of instances of unregistered ASNs: 7 Number of 32-bit ASNs allocated by the RIRs: 46121 Number of 32-bit ASNs visible in the Routing Table: 695 Prefixes from 32-bit ASNs in the Routing Table: 1885 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: 199832209 Equivalent to 11 /8s, 233 /16s and 50 /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: 2381 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4794 Total APNIC prefixes after maximum aggregation: 2313 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4792 Unique aggregates announced from the APNIC address blocks: 2637 APNIC Region origin ASes present in the Internet Routing Table: 591 APNIC Prefixes per ASN: 8.11 APNIC Region origin ASes announcing only one prefix: 247 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 3.8 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 237 Number of APNIC addresses announced to Internet: 45562208 Equivalent to 2 /8s, 183 /16s and 57 /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: 8081 Total ARIN prefixes after maximum aggregation: 4709 ARIN Deaggregation factor: 1.72 Prefixes being announced from the ARIN address blocks: 8097 Unique aggregates announced from the ARIN address blocks: 5227 ARIN Region origin ASes present in the Internet Routing Table: 1255 ARIN Prefixes per ASN: 6.45 ARIN Region origin ASes announcing only one prefix: 442 ARIN Region transit ASes present in the Internet Routing Table: 149 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: 211 Number of ARIN addresses announced to Internet: 90543328 Equivalent to 5 /8s, 101 /16s and 148 /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: 3698 Total RIPE prefixes after maximum aggregation: 2939 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3692 Unique aggregates announced from the RIPE address blocks: 3000 RIPE Region origin ASes present in the Internet Routing Table: 685 RIPE Prefixes per ASN: 5.39 RIPE Region origin ASes announcing only one prefix: 304 RIPE Region transit ASes present in the Internet Routing Table: 107 Average RIPE Region AS path length visible: 2.9 Max RIPE Region AS path length visible: 12 Number of RIPE region 32-bit ASNs visible in the Routing Table: 156 Number of RIPE addresses announced to Internet: 57184529 Equivalent to 3 /8s, 104 /16s and 145 /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: 1539 Total LACNIC prefixes after maximum aggregation: 536 LACNIC Deaggregation factor: 2.87 Prefixes being announced from the LACNIC address blocks: 1535 Unique aggregates announced from the LACNIC address blocks: 701 LACNIC Region origin ASes present in the Internet Routing Table: 151 LACNIC Prefixes per ASN: 10.17 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: 4.6 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61 Number of LACNIC addresses announced to Internet: 4124736 Equivalent to 0 /8s, 62 /16s and 240 /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: 1156 Total AfriNIC prefixes after maximum aggregation: 173 AfriNIC Deaggregation factor: 6.68 Prefixes being announced from the AfriNIC address blocks: 1155 Unique aggregates announced from the AfriNIC address blocks: 230 AfriNIC Region origin ASes present in the Internet Routing Table: 50 AfriNIC Prefixes per ASN: 23.10 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 3.6 Max AfriNIC Region AS path length visible: 19 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 30 Number of AfriNIC addresses announced to Internet: 2414592 Equivalent to 0 /8s, 36 /16s and 216 /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 640 2170 465 SINET-AS Research Organization of Informa 7497 452 180 24 CSTNET-AS-AP Computer Network Information 1237 195 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 142 4192 70 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 68 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/GEANT/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 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 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/GEANT/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 786 196 1750 188 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 3267 92 30 74 NIKS, RU 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 Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 310 178 43 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 52 3 21 CEDIA, EC 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 46 99 35 Fundacao Carlos Chagas Filho de Amparo a 3596 40 8 4 Universidad Autonoma Metropolitana, MX 28614 38 2 2 Fundacao Universidade Regional de Blumena Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 554 82 3 KENET-AS, KE 2018 373 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 13 8 5 NRaE1-AS, NG 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 327700 10 16 1 MoRENet, MZ 36982 8 33 8 UCT, ZA Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 640 2170 465 SINET-AS Research Organization of Informa 36914 554 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 2018 373 318 69 TENET-1, ZA 1916 310 178 43 Rede Nacional de Ensino e Pesquisa, BR 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 668 202 646 172 DNIC-AS-00668, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 786 196 1750 188 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/GEANT/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 554 551 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 TENET-1, ZA 1916 310 267 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 UPRENET, PR 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/GEANT/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 65111 PRIVATE 62.40.96.27/32 20965 GEANT The GEANT IP Serv 65111 PRIVATE 62.40.96.44/32 20965 GEANT The GEANT IP Serv 65111 PRIVATE 62.40.99.40/29 20965 GEANT The GEANT IP Serv 64500 DOCUMENT 62.40.99.56/29 20965 GEANT The GEANT IP Serv 65111 PRIVATE 62.40.117.18/31 20965 GEANT The GEANT IP Serv 65111 PRIVATE 62.40.117.36/31 20965 GEANT The GEANT IP Serv 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US Complete listing at https://bgp.nsrc.org/REN/GEANT/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 202.46.245.0/24 Origin: 147171 IDNIC-BRIN-AS-ID Badan Riset dan Inovasi 202.46.245.0/24 Transit: 64302 IDNIC-IDREN-AS-ID IDREN - Indonesia Rese 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/GEANT/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 /16:1988 /17:408 /18:455 /19:579 /20:861 /21:895 /22:1410 /23:1550 /24:10738 /25:55 /26:75 /27:36 /28:10 /29:15 /30:10 /31:2 /32:7 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 530 554 KENET-AS, KE 8895 105 108 ISU Internet Services Unit ISU, SA 1916 74 310 Rede Nacional de Ensino e Pesquisa, BR 3267 43 92 NIKS, RU 23024 38 99 OCDE, US 32440 33 57 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 57 SEAP-AGE, ES 25977 30 44 HCCS, US Complete listing at https://bgp.nsrc.org/REN/GEANT/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:15 6:4 8:2 12:1 14:92 23:8 24:2 31:1 35:9 37:8 38:10 40:1 41:222 42:11 44:4 45:46 46:4 47:1 49:12 50:2 59:19 60:6 61:3 62:14 63:32 64:43 65:5 66:34 67:39 68:10 69:17 70:2 71:1 72:8 74:53 76:33 77:9 78:3 79:9 80:17 81:24 82:6 83:8 84:11 85:52 86:7 87:1 89:10 91:40 92:2 93:14 94:2 95:2 96:5 97:1 98:2 102:11 103:358 104:79 108:7 109:5 111:21 113:1 114:24 116:7 117:61 118:32 119:30 121:27 122:8 123:8 124:42 125:3 128:57 129:38 130:95 131:63 132:66 133:157 134:110 136:200 137:51 138:58 139:11 140:33 141:3 142:42 143:25 144:27 145:2 146:134 147:56 148:198 149:12 150:69 151:11 152:129 153:14 154:44 155:63 156:135 157:25 158:31 159:117 160:34 161:16 162:22 163:64 164:11 165:48 167:10 168:119 169:7 170:91 172:2 173:6 175:16 177:6 179:13 180:16 181:1 182:12 184:6 185:50 186:3 187:24 188:14 189:3 190:33 191:13 192:1420 193:312 194:133 195:116 196:147 197:337 198:464 199:275 200:332 201:36 202:632 203:418 204:372 205:136 206:210 207:224 208:62 209:118 210:223 211:3 212:147 213:7 214:8 216:91 217:12 218:22 219:6 220:16 222:3 223:15 End of report