IPv4 R&E Routing Table Report 20:00 GMT Sat 10 Oct, 2026 IPv4 BGP Table (R&E) as seen at SingAREN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/SingAREN/ Analysis Summary ---------------- BGP routing table entries examined: 19277 Prefixes after maximum aggregation (per Origin AS): 10615 Deaggregation factor: 1.82 Unique aggregates announced (without unneeded subnets): 11711 Number of IPv4 prefixes with a valid ROA: 9356 Number of IPv4 prefixes with an invalid ROA: 164 Number of IPv4 prefixes with no ROA: 9749 Total ASes present in the Internet Routing Table: 2725 Prefixes per ASN: 7.07 Origin-only ASes present in the Internet Routing Table: 2358 Origin ASes announcing only one prefix: 1066 Transit ASes present in the Internet Routing Table: 367 Transit-only ASes present in the Internet Routing Table: 65 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: 47 Max AS path prepend of ASN ( 30075) 41 Prefixes from unregistered ASNs in the Routing Table: 3 Number of instances of unregistered ASNs: 3 Number of 32-bit ASNs allocated by the RIRs: 51623 Number of 32-bit ASNs visible in the Routing Table: 703 Prefixes from 32-bit ASNs in the Routing Table: 1925 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: 197814016 Equivalent to 11 /8s, 202 /16s and 103 /24s Percentage of available address space announced: 5.3 Percentage of allocated address space announced: 5.3 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: 2225 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4630 Total APNIC prefixes after maximum aggregation: 2205 APNIC Deaggregation factor: 2.10 Prefixes being announced from the APNIC address blocks: 4633 Unique aggregates announced from the APNIC address blocks: 2523 APNIC Region origin ASes present in the Internet Routing Table: 562 APNIC Prefixes per ASN: 8.24 APNIC Region origin ASes announcing only one prefix: 241 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 3.7 Max APNIC Region AS path length visible: 12 Number of APNIC region 32-bit ASNs visible in the Routing Table: 231 Number of APNIC addresses announced to Internet: 45340672 Equivalent to 2 /8s, 179 /16s and 216 /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: 8938 Total ARIN prefixes after maximum aggregation: 5050 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 8952 Unique aggregates announced from the ARIN address blocks: 5628 ARIN Region origin ASes present in the Internet Routing Table: 1315 ARIN Prefixes per ASN: 6.81 ARIN Region origin ASes announcing only one prefix: 471 ARIN Region transit ASes present in the Internet Routing Table: 166 Average ARIN Region AS path length visible: 5.8 Max ARIN Region AS path length visible: 47 Number of ARIN region 32-bit ASNs visible in the Routing Table: 229 Number of ARIN addresses announced to Internet: 89342464 Equivalent to 5 /8s, 83 /16s and 66 /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: 3502 Total RIPE prefixes after maximum aggregation: 2772 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3487 Unique aggregates announced from the RIPE address blocks: 2795 RIPE Region origin ASes present in the Internet Routing Table: 613 RIPE Prefixes per ASN: 5.69 RIPE Region origin ASes announcing only one prefix: 280 RIPE Region transit ASes present in the Internet Routing Table: 104 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: 164 Number of RIPE addresses announced to Internet: 57163776 Equivalent to 3 /8s, 104 /16s and 64 /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 196608-219547 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: 986 Total LACNIC prefixes after maximum aggregation: 391 LACNIC Deaggregation factor: 2.52 Prefixes being announced from the LACNIC address blocks: 986 Unique aggregates announced from the LACNIC address blocks: 480 LACNIC Region origin ASes present in the Internet Routing Table: 122 LACNIC Prefixes per ASN: 8.08 LACNIC Region origin ASes announcing only one prefix: 51 LACNIC Region transit ASes present in the Internet Routing Table: 18 Average LACNIC Region AS path length visible: 5.4 Max LACNIC Region AS path length visible: 11 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 59 Number of LACNIC addresses announced to Internet: 3495168 Equivalent to 0 /8s, 53 /16s and 85 /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: 1218 Total AfriNIC prefixes after maximum aggregation: 194 AfriNIC Deaggregation factor: 6.28 Prefixes being announced from the AfriNIC address blocks: 1217 Unique aggregates announced from the AfriNIC address blocks: 283 AfriNIC Region origin ASes present in the Internet Routing Table: 45 AfriNIC Prefixes per ASN: 27.04 AfriNIC Region origin ASes announcing only one prefix: 23 AfriNIC Region transit ASes present in the Internet Routing Table: 12 Average AfriNIC Region AS path length visible: 4.9 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 20 Number of AfriNIC addresses announced to Internet: 2469632 Equivalent to 0 /8s, 37 /16s and 175 /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 604 2153 464 SINET-AS Research Organization of Informa 7497 467 212 24 CSTNET-AS-AP Computer Network Information 1659 222 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 1237 199 72 154 KREONET-AS-KR KISTI, KR 58647 185 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 115 AARNET-AS-AP Australian Academic and Rese 55824 152 19 20 NKN-CORE-NW NKN Core Network, IN 4538 132 4191 70 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 731 491 99 CENIC-2152 - CENIC, US 2920 225 44 49 LACOE - Los Angeles County Office of Educ 376 196 146 148 RISQ-AS - Reseau dInformations Scientifiq 668 191 608 164 DNIC-AS-00668 - United States Department 5786 167 16 1 UPRENET - University of Puerto Rico, PR 18558 140 18 5 NETBLK-RCOEK - Riverside County Office of 81 122 439 41 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 10430 92 132 87 WA-K20 - Washington State K-20 Telecommun 3477 84 79 41 NOAA-NWAVE - National Oceanic and Atmosph Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 294 1884 255 DFN Verein zur Foerderung eines Deutschen 786 209 1682 191 JANET Jisc Services Limited, GB 559 117 533 106 SWITCH Switch, Swiss Academic and Researc 1103 99 1758 84 SURFNET-NL SURFnet, The Netherlands, NL 8895 98 24 5 ISU Internet Services Unit ISU, SA 2614 87 26 63 ROEDUNET, RO 137 83 677 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 69 623 63 FR-RENATER Reseau National de telecommuni Complete listing at https://bgp.nsrc.org/REN/SingAREN/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 11340 110 25 49 Red Universitaria Nacional, CL 271640 62 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 59 84 39 Fundacao Carlos Chagas Filho de Amparo a 19611 53 17 2 Associacao Antonio Vieira - Unisinos, BR 61468 53 3 22 CEDIA, EC 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 20191 26 16 1 Pontificia Universidad Catolica de Chile, 52888 18 7 8 UNIVERSIDADE FEDERAL DE SAO CARLOS, BR Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 551 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 2561 68 4 34 EUN, EG 8094 50 48 14 PUKNET, ZA 37215 46 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 327700 13 16 1 MoRENet, MZ 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2152 731 491 99 CENIC-2152 - CENIC, US 2907 604 2153 464 SINET-AS Research Organization of Informa 36914 551 82 3 KENET-AS, KE 7497 467 212 24 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 680 294 1884 255 DFN Verein zur Foerderung eines Deutschen 2920 225 44 49 LACOE - Los Angeles County Office of Educ 1659 222 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 1916 219 161 40 Rede Nacional de Ensino e Pesquisa, BR 786 209 1682 191 JANET Jisc Services Limited, GB Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 551 548 KENET-AS, KE 7497 467 443 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 1659 222 187 ERX-TANET-ASN1 Taiwan Academic Network TANet In 58647 185 183 KAGAWAU-AS Kagawa University, JP 1916 219 179 Rede Nacional de Ensino e Pesquisa, BR 2920 225 176 LACOE - Los Angeles County Office of Education, 5786 167 166 UPRENET - University of Puerto Rico, PR 2907 604 140 SINET-AS Research Organization of Information a 18558 140 135 NETBLK-RCOEK - Riverside County Office of Educa Complete listing at https://bgp.nsrc.org/REN/SingAREN/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 64011 UNALLOCATED 130.215.0.0/16 10326 WPI - Worcester Polytec 401367 UNALLOCATED 216.186.25.0/24 10430 WA-K20 - Washington Sta Complete listing at https://bgp.nsrc.org/REN/SingAREN/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 199.233.182.0/24 Origin: 3734 SCCO - Santa Clara County Office of Educ 199.233.182.0/24 Transit: 2152 CENIC-2152 - CENIC, US Complete listing at https://bgp.nsrc.org/REN/SingAREN/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 /13:17 /14:35 /15:116 /16:1950 /17:410 /18:464 /19:584 /20:835 /21:882 /22:1500 /23:1687 /24:10783 /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 527 551 KENET-AS, KE 8895 95 98 ISU Internet Services Unit ISU, SA 2152 88 731 CENIC-2152 - CENIC, US 31638 50 50 ASN-LEPIDA, IT 37215 40 46 MAREN, MW 200521 33 57 SEAP-AGE, ES 25977 30 44 HCCS - HOUSTON COMMUNITY COLLEGE SYSTEM, US 27609 29 45 USC-UNIVERSITY-HOSPITAL - USC-University Hospital, US 18632 28 55 VOLCANO-VISION - Volcano Vision, Inc., US 61468 27 53 CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/SingAREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 5:21 6:5 8:13 12:1 14:94 23:20 24:3 31:2 35:3 37:27 38:11 40:1 41:234 42:8 44:8 45:43 46:6 47:1 49:12 50:7 59:18 60:6 61:3 62:6 63:36 64:45 65:8 66:59 67:40 68:11 69:21 70:3 71:1 72:6 74:40 76:23 77:4 78:3 79:6 80:9 81:29 82:3 83:7 84:8 85:26 86:4 87:1 89:17 91:34 92:1 93:17 94:7 95:2 96:5 97:1 98:3 101:2 102:6 103:318 104:86 107:13 108:8 109:13 111:3 113:2 114:17 116:9 117:5 118:35 119:36 121:3 122:8 123:6 124:42 125:1 126:1 128:57 129:58 130:101 131:69 132:48 133:160 134:123 136:169 137:123 138:13 139:5 140:82 141:8 142:34 143:28 144:2 145:14 146:135 147:68 148:12 149:11 150:43 151:8 152:129 153:27 154:44 155:92 156:125 157:25 158:23 159:112 160:37 161:37 162:23 163:107 164:13 165:52 166:1 167:35 168:104 169:7 170:22 171:1 172:1 173:7 174:1 175:4 177:7 179:12 180:12 181:1 182:3 184:5 185:50 186:5 187:8 188:21 190:25 191:13 192:1482 193:310 194:119 195:95 196:148 197:338 198:584 199:284 200:307 201:6 202:554 203:426 204:398 205:186 206:201 207:367 208:40 209:165 210:224 211:14 212:135 213:8 214:8 216:90 217:23 218:21 219:6 220:14 222:2 223:16 End of report