IPv4 R&E Routing Table Report 18:35 GMT Fri 08 Aug, 2025 IPv4 BGP Table (R&E) as seen at KENET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/KENET/ Analysis Summary ---------------- BGP routing table entries examined: 17281 Prefixes after maximum aggregation (per Origin AS): 9556 Deaggregation factor: 1.81 Unique aggregates announced (without unneeded subnets): 10534 Number of IPv4 prefixes with a valid ROA: 7156 Number of IPv4 prefixes with an invalid ROA: 5 Number of IPv4 prefixes with no ROA: 10120 Total ASes present in the Internet Routing Table: 2568 Prefixes per ASN: 6.73 Origin-only ASes present in the Internet Routing Table: 2228 Origin ASes announcing only one prefix: 997 Transit ASes present in the Internet Routing Table: 340 Transit-only ASes present in the Internet Routing Table: 59 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.2 Max AS path length visible: 16 Max AS path prepend of ASN ( 10497) 11 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 47085 Number of 32-bit ASNs visible in the Routing Table: 654 Prefixes from 32-bit ASNs in the Routing Table: 1702 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: 190268672 Equivalent to 11 /8s, 87 /16s and 69 /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: 2067 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4836 Total APNIC prefixes after maximum aggregation: 2334 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4833 Unique aggregates announced from the APNIC address blocks: 2672 APNIC Region origin ASes present in the Internet Routing Table: 602 APNIC Prefixes per ASN: 8.03 APNIC Region origin ASes announcing only one prefix: 255 APNIC Region transit ASes present in the Internet Routing Table: 51 Average APNIC Region AS path length visible: 5.6 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 246 Number of APNIC addresses announced to Internet: 45371648 Equivalent to 2 /8s, 180 /16s and 81 /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: 6523 Total ARIN prefixes after maximum aggregation: 3687 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 6573 Unique aggregates announced from the ARIN address blocks: 4024 ARIN Region origin ASes present in the Internet Routing Table: 1095 ARIN Prefixes per ASN: 6.00 ARIN Region origin ASes announcing only one prefix: 384 ARIN Region transit ASes present in the Internet Routing Table: 139 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 185 Number of ARIN addresses announced to Internet: 81174528 Equivalent to 4 /8s, 214 /16s and 160 /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: 3634 Total RIPE prefixes after maximum aggregation: 2897 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3618 Unique aggregates announced from the RIPE address blocks: 2941 RIPE Region origin ASes present in the Internet Routing Table: 666 RIPE Prefixes per ASN: 5.43 RIPE Region origin ASes announcing only one prefix: 297 RIPE Region transit ASes present in the Internet Routing Table: 106 Average RIPE Region AS path length visible: 5.0 Max RIPE Region AS path length visible: 16 Number of RIPE region 32-bit ASNs visible in the Routing Table: 157 Number of RIPE addresses announced to Internet: 57988352 Equivalent to 3 /8s, 116 /16s and 213 /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: 1266 Total LACNIC prefixes after maximum aggregation: 491 LACNIC Deaggregation factor: 2.58 Prefixes being announced from the LACNIC address blocks: 1266 Unique aggregates announced from the LACNIC address blocks: 657 LACNIC Region origin ASes present in the Internet Routing Table: 134 LACNIC Prefixes per ASN: 9.45 LACNIC Region origin ASes announcing only one prefix: 57 LACNIC Region transit ASes present in the Internet Routing Table: 25 Average LACNIC Region AS path length visible: 6.0 Max LACNIC Region AS path length visible: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 4069120 Equivalent to 0 /8s, 62 /16s and 23 /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: 989 Total AfriNIC prefixes after maximum aggregation: 142 AfriNIC Deaggregation factor: 6.96 Prefixes being announced from the AfriNIC address blocks: 989 Unique aggregates announced from the AfriNIC address blocks: 238 AfriNIC Region origin ASes present in the Internet Routing Table: 10 AfriNIC Prefixes per ASN: 98.90 AfriNIC Region origin ASes announcing only one prefix: 4 AfriNIC Region transit ASes present in the Internet Routing Table: 4 Average AfriNIC Region AS path length visible: 1.9 Max AfriNIC Region AS path length visible: 5 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 4 Number of AfriNIC addresses announced to Internet: 1664512 Equivalent to 0 /8s, 25 /16s and 102 /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 595 2153 459 SINET-AS Research Organization of Informa 7497 451 180 23 CSTNET-AS-AP Computer Network Information 4538 196 4192 72 ERX-CERNET-BKB China Education and Resear 1237 194 74 146 KREONET-AS-KR KISTI, KR 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 170 281 115 AARNET-AS-AP Australian Academic and Rese 55824 149 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 66 37 9 UNINET-AS-AP UNINET-, TH 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 5786 199 16 1 UPRENET, PR 2920 179 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US 21976 90 34 16 NJEDGE-NET, US 237 85 543 51 MERIT-AS-14, US 1736 78 16 1 MU-AS, US 3477 77 63 39 NOAA-NWAVE, US 22742 68 37 32 CT-EDU-NET, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 286 1883 252 DFN Verein zur Foerderung eines Deutschen 786 191 1742 186 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 109 24 5 ISU Internet Services Unit ISU, SA 1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 3267 80 29 69 NIKS, RU 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 240 177 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 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 53 100 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/KENET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 574 80 56 KENET-AS, KE 2018 376 318 69 TENET-1, ZA 6879 24 2 9 ENSTINET-, EG 30983 4 4 1 MARWAN-AS, MA 329522 4 1 2 SANSA, ZA 328225 3 0 1 Strathmore-University, KE 3208 1 2 1 ARN, DZ 6149 1 0 1 TENET-2, ZA 327945 1 0 1 ILRI, KE 329418 1 0 1 International-Centre-Research-Agroforestr Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 595 2153 459 SINET-AS Research Organization of Informa 36914 574 80 56 KENET-AS, KE 7497 451 180 23 CSTNET-AS-AP Computer Network Information 2018 376 318 69 TENET-1, ZA 680 286 1883 252 DFN Verein zur Foerderung eines Deutschen 1916 240 177 41 Rede Nacional de Ensino e Pesquisa, BR 5786 199 16 1 UPRENET, PR 4538 196 4192 72 ERX-CERNET-BKB China Education and Resear 1237 194 74 146 KREONET-AS-KR KISTI, KR 786 191 1742 186 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/KENET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 574 518 KENET-AS, KE 7497 451 428 CSTNET-AS-AP Computer Network Information Cente 2018 376 307 TENET-1, ZA 1916 240 199 Rede Nacional de Ensino e Pesquisa, BR 5786 199 198 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 179 172 LACOE, US 18558 139 135 NETBLK-RCOEK, US 55824 149 128 NKN-CORE-NW NKN Core Network, IN 4538 196 124 ERX-CERNET-BKB China Education and Research Net Complete listing at https://bgp.nsrc.org/REN/KENET/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 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 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/KENET/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/KENET/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 /12:11 /13:18 /14:35 /15:114 /16:1852 /17:391 /18:420 /19:551 /20:788 /21:793 /22:1285 /23:1417 /24:9603 /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 551 574 KENET-AS, KE 8895 106 109 ISU Internet Services Unit ISU, SA 3267 35 80 NIKS, RU 200521 34 59 SEAP-AGE, ES 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 61468 25 52 CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/KENET/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 35:4 37:14 38:10 40:1 41:185 42:18 44:6 45:46 46:5 47:1 49:12 50:2 52:1 58:15 59:20 60:6 61:3 62:8 63:32 64:43 65:5 66:40 67:40 68:12 69:17 70:2 71:1 72:8 74:54 76:25 77:9 78:3 79:9 80:13 81:27 82:6 83:8 84:4 85:49 86:6 87:1 89:9 91:40 92:2 93:15 94:2 95:2 97:1 98:2 101:3 102:1 103:359 104:74 108:8 109:7 110:1 111:20 113:1 114:21 116:8 117:61 118:34 119:31 121:28 122:8 123:8 124:42 125:5 128:57 129:42 130:95 131:43 132:62 133:156 134:101 136:200 137:52 138:11 139:4 140:31 141:4 143:20 144:31 145:4 146:137 147:51 148:200 149:10 150:36 151:10 152:136 153:15 154:25 155:85 156:134 157:25 158:25 159:116 160:34 161:17 162:21 163:75 164:10 165:43 167:8 168:96 169:6 170:19 171:1 172:1 173:5 175:16 177:5 179:9 180:16 181:1 182:12 184:6 185:52 186:4 187:24 188:16 190:17 191:13 192:1315 193:293 194:145 195:82 196:136 197:359 198:296 199:139 200:305 201:22 202:632 203:433 204:324 205:61 206:118 207:156 208:59 209:62 210:217 211:6 212:148 213:4 216:70 217:22 218:23 219:7 220:13 222:4 223:16 End of report