IPv4 R&E Routing Table Report 18:35 GMT Tue 12 May, 2026 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: 17394 Prefixes after maximum aggregation (per Origin AS): 9950 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 10990 Number of IPv4 prefixes with a valid ROA: 7797 Number of IPv4 prefixes with an invalid ROA: 6 Number of IPv4 prefixes with no ROA: 9591 Total ASes present in the Internet Routing Table: 2549 Prefixes per ASN: 6.82 Origin-only ASes present in the Internet Routing Table: 2218 Origin ASes announcing only one prefix: 983 Transit ASes present in the Internet Routing Table: 331 Transit-only ASes present in the Internet Routing Table: 54 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.7 Max AS path length visible: 17 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 2 Number of instances of unregistered ASNs: 2 Number of 32-bit ASNs allocated by the RIRs: 49733 Number of 32-bit ASNs visible in the Routing Table: 653 Prefixes from 32-bit ASNs in the Routing Table: 1842 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: 191394048 Equivalent to 11 /8s, 104 /16s and 113 /24s Percentage of available address space announced: 5.2 Percentage of allocated address space announced: 5.2 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: 1797 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4111 Total APNIC prefixes after maximum aggregation: 1947 APNIC Deaggregation factor: 2.11 Prefixes being announced from the APNIC address blocks: 4111 Unique aggregates announced from the APNIC address blocks: 2079 APNIC Region origin ASes present in the Internet Routing Table: 540 APNIC Prefixes per ASN: 7.61 APNIC Region origin ASes announcing only one prefix: 241 APNIC Region transit ASes present in the Internet Routing Table: 50 Average APNIC Region AS path length visible: 5.8 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 236 Number of APNIC addresses announced to Internet: 41973504 Equivalent to 2 /8s, 128 /16s and 119 /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: 7915 Total ARIN prefixes after maximum aggregation: 4726 ARIN Deaggregation factor: 1.67 Prefixes being announced from the ARIN address blocks: 7928 Unique aggregates announced from the ARIN address blocks: 5355 ARIN Region origin ASes present in the Internet Routing Table: 1246 ARIN Prefixes per ASN: 6.36 ARIN Region origin ASes announcing only one prefix: 433 ARIN Region transit ASes present in the Internet Routing Table: 146 Average ARIN Region AS path length visible: 6.2 Max ARIN Region AS path length visible: 17 Number of ARIN region 32-bit ASNs visible in the Routing Table: 214 Number of ARIN addresses announced to Internet: 87799552 Equivalent to 5 /8s, 59 /16s and 183 /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, 393216-404380 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: 3241 Total RIPE prefixes after maximum aggregation: 2678 RIPE Deaggregation factor: 1.21 Prefixes being announced from the RIPE address blocks: 3230 Unique aggregates announced from the RIPE address blocks: 2715 RIPE Region origin ASes present in the Internet Routing Table: 580 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: 97 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 147 Number of RIPE addresses announced to Internet: 56125184 Equivalent to 3 /8s, 88 /16s and 103 /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: 1220 Total LACNIC prefixes after maximum aggregation: 467 LACNIC Deaggregation factor: 2.61 Prefixes being announced from the LACNIC address blocks: 1218 Unique aggregates announced from the LACNIC address blocks: 637 LACNIC Region origin ASes present in the Internet Routing Table: 120 LACNIC Prefixes per ASN: 10.15 LACNIC Region origin ASes announcing only one prefix: 46 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 6.8 Max LACNIC Region AS path length visible: 16 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 53 Number of LACNIC addresses announced to Internet: 3840768 Equivalent to 0 /8s, 58 /16s and 155 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-275868 + 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: 905 Total AfriNIC prefixes after maximum aggregation: 130 AfriNIC Deaggregation factor: 6.96 Prefixes being announced from the AfriNIC address blocks: 905 Unique aggregates announced from the AfriNIC address blocks: 202 AfriNIC Region origin ASes present in the Internet Routing Table: 7 AfriNIC Prefixes per ASN: 129.29 AfriNIC Region origin ASes announcing only one prefix: 3 AfriNIC Region transit ASes present in the Internet Routing Table: 3 Average AfriNIC Region AS path length visible: 1.9 Max AfriNIC Region AS path length visible: 6 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 3 Number of AfriNIC addresses announced to Internet: 1654528 Equivalent to 0 /8s, 25 /16s and 63 /24s AfriNIC AS Blocks 36864-37887, 327680-330751 & 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 606 2153 464 SINET-AS Research Organization of Informa 7497 464 212 24 CSTNET-AS-AP Computer Network Information 4538 192 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 166 281 113 AARNET-AS-AP Australian Academic and Rese 55824 152 19 20 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 1659 63 954 34 ERX-TANET-ASN1 Taiwan Academic Network TA 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 4621 54 35 8 UNINET-AS-AP UNINET-, TH 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 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 150 RISQ-AS - Reseau dInformations Scientifiq 668 186 585 159 DNIC-AS-00668 - United States Department 2920 173 34 7 LACOE - Los Angeles County Office of Educ 2152 146 491 96 CENIC-2152 - CENIC, US 18558 140 18 4 NETBLK-RCOEK - Riverside County Office of 81 115 455 35 NCREN - MCNC, US 21976 92 34 14 NJEDGE-NET - NJEDge.Net, Inc., US 237 83 542 49 MERIT-AS-14 - Merit Network Inc., US 3477 82 79 40 NOAA-NWAVE - National Oceanic and Atmosph 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 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 786 210 1699 192 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 1103 99 1503 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 87 26 67 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 78 88 73 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 200521 57 4 25 SEAP-AGE, ES 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 219 161 40 Rede Nacional de Ensino e Pesquisa, BR 28391 161 10 72 Universidad Juarez Autonoma de Tabasco, M 11340 110 25 49 Red Universitaria Nacional, CL 3596 66 8 4 Universidad Autonoma Metropolitana, MX 271640 65 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 19611 53 17 2 Associacao Antonio Vieira - Unisinos, BR 2715 51 84 38 Fundacao Carlos Chagas Filho de Amparo a 61468 51 3 20 CEDIA, EC 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 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 522 80 56 KENET-AS, KE 2018 373 318 69 TENET-1, ZA 30983 4 4 1 MARWAN-AS, MA 328225 3 0 1 Strathmore-University, KE 3208 1 2 1 ARN, DZ 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 606 2153 464 SINET-AS Research Organization of Informa 36914 522 80 56 KENET-AS, KE 7497 464 212 24 CSTNET-AS-AP Computer Network Information 2018 373 318 69 TENET-1, ZA 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 1916 219 161 40 Rede Nacional de Ensino e Pesquisa, BR 786 210 1699 192 JANET Jisc Services Limited, GB 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 150 RISQ-AS - Reseau dInformations Scientifiq 4538 192 4192 72 ERX-CERNET-BKB China Education and Resear 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 522 466 KENET-AS, KE 7497 464 440 CSTNET-AS-AP Computer Network Information Cente 2018 373 304 TENET-1, ZA 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 1916 219 179 Rede Nacional de Ensino e Pesquisa, BR 2920 173 166 LACOE - Los Angeles County Office of Education, 18558 140 136 NETBLK-RCOEK - Riverside County Office of Educa 55824 152 132 NKN-CORE-NW NKN Core Network, IN 4538 192 120 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 - University 401367 UNALLOCATED 216.186.25.0/24 10430 WA-K20 - Washington Sta 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 Adelaide Unive 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 /11:0 /12:10 /13:18 /14:33 /15:114 /16:1910 /17:408 /18:440 /19:563 /20:775 /21:810 /22:1266 /23:1422 /24:9623 /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 499 522 KENET-AS, KE 31638 48 48 ASN-LEPIDA, IT 200521 33 57 SEAP-AGE, ES 46115 32 35 LUTHER - Luther College, US 25977 30 44 HCCS - HOUSTON COMMUNITY COLLEGE SYSTEM, US 27609 29 45 USC-UNIVERSITY-HOSPITAL - USC-University Hospital, US 40326 29 33 ECKERD-COLLEGE - Eckerd College, US 61468 25 51 CEDIA, EC 36794 24 26 META SOLUTIONS PIKETON - META Solutions, US 400238 22 43 PIEG-01 - PIE&G, US Complete listing at https://bgp.nsrc.org/REN/KENET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1 5:19 6:5 8:2 12:1 14:96 23:9 24:1 31:1 35:3 37:21 38:10 40:1 41:169 42:20 44:6 45:34 46:4 47:1 49:13 50:3 58:14 59:18 60:6 61:3 62:5 63:32 64:43 65:6 66:37 67:39 68:12 69:18 70:2 72:6 74:55 76:26 77:4 78:3 79:5 80:7 81:27 82:3 83:7 84:4 85:26 86:1 87:1 89:17 91:31 93:14 94:2 95:2 96:5 97:1 98:2 101:5 102:1 103:335 104:77 108:9 109:11 110:1 111:2 114:5 116:7 117:2 118:32 119:27 121:18 122:8 123:8 124:42 125:3 128:58 129:46 130:100 131:59 132:63 133:157 134:92 136:199 137:62 138:9 139:5 140:33 141:8 142:31 143:20 144:4 145:13 146:135 147:50 148:231 149:11 150:29 151:9 152:116 153:15 154:24 155:87 156:123 157:27 158:27 159:113 160:34 161:34 162:20 163:79 164:10 165:47 166:1 167:17 168:104 169:7 170:16 172:1 173:5 175:11 177:6 179:12 180:16 181:1 182:11 184:2 185:36 186:3 187:8 188:22 190:17 191:13 192:1418 193:260 194:115 195:50 196:136 197:322 198:452 199:277 200:311 201:5 202:572 203:316 204:386 205:123 206:202 207:218 208:35 209:93 210:127 211:14 212:42 213:4 214:7 216:92 217:22 218:19 219:7 220:3 222:3 223:6 End of report