IPv4 R&E Routing Table Report 19:10 GMT Sat 19 Apr, 2025 IPv4 BGP Table (R&E) as seen at PERN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/PERN/ Analysis Summary ---------------- BGP routing table entries examined: 18974 Prefixes after maximum aggregation (per Origin AS): 10355 Deaggregation factor: 1.83 Unique aggregates announced (without unneeded subnets): 11435 Number of IPv4 prefixes with a valid ROA: 7509 Number of IPv4 prefixes with an invalid ROA: 7 Number of IPv4 prefixes with no ROA: 11458 Total ASes present in the Internet Routing Table: 2770 Prefixes per ASN: 6.85 Origin-only ASes present in the Internet Routing Table: 2400 Origin ASes announcing only one prefix: 1071 Transit ASes present in the Internet Routing Table: 370 Transit-only ASes present in the Internet Routing Table: 68 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 6.4 Max AS path length visible: 26 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 34 Number of instances of unregistered ASNs: 34 Number of 32-bit ASNs allocated by the RIRs: 46245 Number of 32-bit ASNs visible in the Routing Table: 707 Prefixes from 32-bit ASNs in the Routing Table: 1907 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: 190200064 Equivalent to 11 /8s, 86 /16s and 57 /24s Percentage of available address space announced: 5.1 Percentage of allocated address space announced: 5.1 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: 2251 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4793 Total APNIC prefixes after maximum aggregation: 2277 APNIC Deaggregation factor: 2.10 Prefixes being announced from the APNIC address blocks: 4793 Unique aggregates announced from the APNIC address blocks: 2633 APNIC Region origin ASes present in the Internet Routing Table: 597 APNIC Prefixes per ASN: 8.03 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 5.2 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 245 Number of APNIC addresses announced to Internet: 39745024 Equivalent to 2 /8s, 94 /16s and 118 /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: 8101 Total ARIN prefixes after maximum aggregation: 4513 ARIN Deaggregation factor: 1.80 Prefixes being announced from the ARIN address blocks: 8147 Unique aggregates announced from the ARIN address blocks: 4955 ARIN Region origin ASes present in the Internet Routing Table: 1258 ARIN Prefixes per ASN: 6.48 ARIN Region origin ASes announcing only one prefix: 452 ARIN Region transit ASes present in the Internet Routing Table: 160 Average ARIN Region AS path length visible: 7.4 Max ARIN Region AS path length visible: 20 Number of ARIN region 32-bit ASNs visible in the Routing Table: 220 Number of ARIN addresses announced to Internet: 85829376 Equivalent to 5 /8s, 29 /16s and 167 /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: 3626 Total RIPE prefixes after maximum aggregation: 2891 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3612 Unique aggregates announced from the RIPE address blocks: 2940 RIPE Region origin ASes present in the Internet Routing Table: 656 RIPE Prefixes per ASN: 5.51 RIPE Region origin ASes announcing only one prefix: 284 RIPE Region transit ASes present in the Internet Routing Table: 105 Average RIPE Region AS path length visible: 5.2 Max RIPE Region AS path length visible: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 150 Number of RIPE addresses announced to Internet: 58041600 Equivalent to 3 /8s, 117 /16s and 165 /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: 1285 Total LACNIC prefixes after maximum aggregation: 493 LACNIC Deaggregation factor: 2.61 Prefixes being announced from the LACNIC address blocks: 1285 Unique aggregates announced from the LACNIC address blocks: 678 LACNIC Region origin ASes present in the Internet Routing Table: 135 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: 24 Average LACNIC Region AS path length visible: 7.9 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 61 Number of LACNIC addresses announced to Internet: 4086016 Equivalent to 0 /8s, 62 /16s and 89 /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: 1135 Total AfriNIC prefixes after maximum aggregation: 175 AfriNIC Deaggregation factor: 6.49 Prefixes being announced from the AfriNIC address blocks: 1134 Unique aggregates announced from the AfriNIC address blocks: 226 AfriNIC Region origin ASes present in the Internet Routing Table: 53 AfriNIC Prefixes per ASN: 21.40 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 6.6 Max AfriNIC Region AS path length visible: 26 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 31 Number of AfriNIC addresses announced to Internet: 2495488 Equivalent to 0 /8s, 38 /16s and 20 /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 453 180 24 CSTNET-AS-AP Computer Network Information 1237 194 74 146 KREONET-AS-KR KISTI, KR 4538 193 4192 72 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 282 117 AARNET-AS-AP Australian Academic and Rese 55824 146 19 20 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 66 37 8 UNINET-AS-AP UNINET-, TH 23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR Complete listing at https://bgp.nsrc.org/REN/PERN/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 543 507 99 CENIC-2152, US 2920 222 44 49 LACOE, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 18558 140 18 5 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 23024 99 7 17 OCDE, US 21976 90 34 16 NJEDGE-NET, US 237 85 542 51 MERIT-AS-14, US 1736 79 16 1 MU-AS, US Complete listing at https://bgp.nsrc.org/REN/PERN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 786 197 1750 189 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 107 24 5 ISU Internet Services Unit ISU, SA 1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 89 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 3267 79 29 69 NIKS, RU 553 75 366 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/PERN/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 159 10 71 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/PERN/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 373 318 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 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/PERN/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 2152 543 507 99 CENIC-2152, US 36914 537 82 3 KENET-AS, KE 7497 453 180 24 CSTNET-AS-AP Computer Network Information 2018 373 318 69 TENET-1, ZA 680 285 1899 250 DFN Verein zur Foerderung eines Deutschen 1916 236 178 41 Rede Nacional de Ensino e Pesquisa, BR 2920 222 44 49 LACOE, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR Complete listing at https://bgp.nsrc.org/REN/PERN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 537 534 KENET-AS, KE 2152 543 444 CENIC-2152, US 7497 453 429 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 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 222 173 LACOE, US 18558 140 135 NETBLK-RCOEK, US 55824 146 126 NKN-CORE-NW NKN Core Network, IN Complete listing at https://bgp.nsrc.org/REN/PERN/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 36288 UNALLOCATED 64.79.154.0/24 293 ESNET, US 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 Complete listing at https://bgp.nsrc.org/REN/PERN/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/PERN/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 /11:0 /12:10 /13:17 /14:32 /15:110 /16:1916 /17:403 /18:456 /19:579 /20:822 /21:828 /22:1440 /23:1573 /24:10786 /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 104 107 ISU Internet Services Unit ISU, SA 2152 63 543 CENIC-2152, US 23024 38 99 OCDE, US 3267 35 79 NIKS, RU 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 32440 31 54 LONI, US 200521 31 56 SEAP-AGE, ES 25977 30 44 HCCS, US Complete listing at https://bgp.nsrc.org/REN/PERN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 5:16 8:2 12:2 14:93 23:8 24:3 31:1 35:10 37:9 38:11 40:1 41:216 42:18 44:4 45:47 46:4 47:1 49:8 50:2 52:1 58:15 59:20 60:6 61:3 62:8 63:32 64:43 65:5 66:42 67:39 68:11 69:16 70:2 71:1 72:8 74:54 76:34 77:10 78:3 79:9 80:13 81:24 82:6 83:8 84:5 85:51 86:5 87:1 89:10 91:40 92:2 93:14 94:2 95:2 96:5 97:1 98:2 101:3 102:11 103:366 104:79 108:8 109:5 111:21 113:1 114:24 116:9 117:60 118:34 119:30 121:28 122:8 123:8 124:42 125:5 128:56 129:42 130:99 131:63 132:68 133:157 134:104 136:199 137:100 138:10 139:11 140:31 141:4 142:26 143:25 144:25 145:2 146:137 147:59 148:200 149:11 150:69 151:11 152:138 153:15 154:45 155:84 156:128 157:26 158:28 159:117 160:34 161:16 162:22 163:62 164:12 165:43 167:29 168:103 169:7 170:20 171:1 172:2 173:6 175:16 177:5 179:12 180:16 181:1 182:12 184:2 185:50 186:3 187:26 188:14 189:3 190:17 191:13 192:1383 193:304 194:141 195:82 196:148 197:329 198:514 199:246 200:295 201:38 202:624 203:439 204:391 205:173 206:209 207:307 208:67 209:162 210:224 211:4 212:143 213:4 216:93 217:21 218:23 219:6 220:17 222:4 223:5 End of report