IPv4 R&E Routing Table Report 19:05 GMT Wed 14 Oct, 2026 IPv4 BGP Table (R&E) as seen at BDREN. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/BDREN/ Analysis Summary ---------------- BGP routing table entries examined: 19480 Prefixes after maximum aggregation (per Origin AS): 10640 Deaggregation factor: 1.83 Unique aggregates announced (without unneeded subnets): 11687 Number of IPv4 prefixes with a valid ROA: 9390 Number of IPv4 prefixes with an invalid ROA: 279 Number of IPv4 prefixes with no ROA: 9811 Total ASes present in the Internet Routing Table: 2707 Prefixes per ASN: 7.20 Origin-only ASes present in the Internet Routing Table: 2347 Origin ASes announcing only one prefix: 1049 Transit ASes present in the Internet Routing Table: 360 Transit-only ASes present in the Internet Routing Table: 61 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 5.1 Max AS path length visible: 11 Max AS path prepend of ASN ( 45768) 8 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: 51674 Number of 32-bit ASNs visible in the Routing Table: 697 Prefixes from 32-bit ASNs in the Routing Table: 1914 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: 197679872 Equivalent to 11 /8s, 200 /16s and 91 /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: 2255 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4669 Total APNIC prefixes after maximum aggregation: 2234 APNIC Deaggregation factor: 2.09 Prefixes being announced from the APNIC address blocks: 4667 Unique aggregates announced from the APNIC address blocks: 2524 APNIC Region origin ASes present in the Internet Routing Table: 560 APNIC Prefixes per ASN: 8.33 APNIC Region origin ASes announcing only one prefix: 240 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 4.8 Max APNIC Region AS path length visible: 11 Number of APNIC region 32-bit ASNs visible in the Routing Table: 228 Number of APNIC addresses announced to Internet: 45339648 Equivalent to 2 /8s, 179 /16s and 212 /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: 9011 Total ARIN prefixes after maximum aggregation: 5044 ARIN Deaggregation factor: 1.79 Prefixes being announced from the ARIN address blocks: 9027 Unique aggregates announced from the ARIN address blocks: 5620 ARIN Region origin ASes present in the Internet Routing Table: 1308 ARIN Prefixes per ASN: 6.90 ARIN Region origin ASes announcing only one prefix: 463 ARIN Region transit ASes present in the Internet Routing Table: 163 Average ARIN Region AS path length visible: 5.4 Max ARIN Region AS path length visible: 11 Number of ARIN region 32-bit ASNs visible in the Routing Table: 227 Number of ARIN addresses announced to Internet: 89290496 Equivalent to 5 /8s, 82 /16s and 119 /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: 3597 Total RIPE prefixes after maximum aggregation: 2778 RIPE Deaggregation factor: 1.29 Prefixes being announced from the RIPE address blocks: 3584 Unique aggregates announced from the RIPE address blocks: 2789 RIPE Region origin ASes present in the Internet Routing Table: 612 RIPE Prefixes per ASN: 5.86 RIPE Region origin ASes announcing only one prefix: 275 RIPE Region transit ASes present in the Internet Routing Table: 103 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 11 Number of RIPE region 32-bit ASNs visible in the Routing Table: 165 Number of RIPE addresses announced to Internet: 57085952 Equivalent to 3 /8s, 103 /16s and 16 /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: 980 Total LACNIC prefixes after maximum aggregation: 389 LACNIC Deaggregation factor: 2.52 Prefixes being announced from the LACNIC address blocks: 980 Unique aggregates announced from the LACNIC address blocks: 470 LACNIC Region origin ASes present in the Internet Routing Table: 120 LACNIC Prefixes per ASN: 8.17 LACNIC Region origin ASes announcing only one prefix: 50 LACNIC Region transit ASes present in the Internet Routing Table: 19 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: 3492864 Equivalent to 0 /8s, 53 /16s and 76 /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: 1220 Total AfriNIC prefixes after maximum aggregation: 192 AfriNIC Deaggregation factor: 6.35 Prefixes being announced from the AfriNIC address blocks: 1219 Unique aggregates announced from the AfriNIC address blocks: 281 AfriNIC Region origin ASes present in the Internet Routing Table: 43 AfriNIC Prefixes per ASN: 28.35 AfriNIC Region origin ASes announcing only one prefix: 21 AfriNIC Region transit ASes present in the Internet Routing Table: 11 Average AfriNIC Region AS path length visible: 4.3 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 18 Number of AfriNIC addresses announced to Internet: 2468352 Equivalent to 0 /8s, 37 /16s and 170 /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 615 2153 473 SINET-AS - Research Organization of Infor 7497 469 212 24 CSTNET-AS-AP - Computer Network Informati 1659 227 1466 35 ERX-TANET-ASN1 - Taiwan Academic Network 1237 200 72 155 KREONET-AS-KR-KR - KISTI, KR 58647 185 18 2 KAGAWAU-AS - Kagawa University, JP 7575 168 281 115 AARNET-AS-AP - Australian Academic and Re 55824 152 19 20 NKN-CORE-NW - NKN Core Network, IN 4538 133 4191 71 ERX-CERNET-BKB - China Education and Rese 4762 75 4 1 MAHIDOL-BORDER-AS - Mahidol University, T 6262 63 134 56 CSIRO - Commonwealth Scientific and Indus Complete listing at https://bgp.nsrc.org/REN/BDREN/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 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 148 RISQ-AS - Reseau d'Informations Scientifi 668 192 624 165 DNIC-AS-00668 - United States Department 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/BDREN/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 295 1884 255 DFN - Verein zur Foerderung eines Deutsch 786 219 1682 191 JANET - Jisc Services Limited, GB 559 117 533 106 Switch - SWITCH, CH 1103 100 1758 84 SURFNET-NL - SURF B.V., NL 137 99 677 77 ASGARR - Consortium GARR, IT 8895 97 24 5 ISU - King Abdul Aziz City for Science an 2614 94 26 67 RoEduNet - Agentia de Administrare a Rete 1930 79 88 73 RCCN - Fundacao para a Ciencia e a Tecnol 553 75 366 75 BELWUE - Universitaet Stuttgart, DE 2200 72 623 65 FR-RENATER - Renater, FR Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 219 161 40 AS1916 - Rede Nacional de Ensino e Pesqui 11340 103 24 48 AS11340 - Red Universitaria Nacional, CL 271640 62 8 1 AS271640 - UNIVERSIDADE FEDERAL DE VICOSA 2715 60 84 40 AS2715 - Fundacao Carlos Chagas Filho de 19611 53 17 2 AS19611 - Associacao Antonio Vieira - Uni 61468 53 3 22 AS61468 - CEDIA, EC 1251 37 31 26 AS1251 - FUNDACAO DE AMPARO A PESQUISA DO 21612 27 16 1 AS21612 - FUNDACAO INSTITUTO OSWALDO CRUZ 20191 26 16 1 AS20191 - Pontificia Universidad Catolica 52888 18 7 8 AS52888 - UNIVERSIDADE FEDERAL DE SAO CAR Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 554 82 3 Kenya Education Network - Kenya Education 2018 375 318 69 Tertiary Education and Research Network o 2561 68 4 34 Egyptian Universities Network (EUN) - Egy 8094 50 48 14 North West University - North West Univer 37215 46 8 1 Malawi Research and Education Network - M 6879 24 2 9 ENSTINET - ENSTINET, EG 327700 14 16 1 Mozambique Research & Education Network - 37501 11 49 6 University of the Free State - University 37654 10 1 6 Rwanda Ministry of Education - Rwanda Min 36982 8 33 8 University of Cape Town - University of C Complete listing at https://bgp.nsrc.org/REN/BDREN/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 615 2153 473 SINET-AS - Research Organization of Infor 36914 554 82 3 Kenya Education Network - Kenya Education 7497 469 212 24 CSTNET-AS-AP - Computer Network Informati 2018 375 318 69 Tertiary Education and Research Network o 680 295 1884 255 DFN - Verein zur Foerderung eines Deutsch 1659 227 1466 35 ERX-TANET-ASN1 - Taiwan Academic Network 2920 225 44 49 LACOE - Los Angeles County Office of Educ 786 219 1682 191 JANET - Jisc Services Limited, GB 1916 219 161 40 AS1916 - Rede Nacional de Ensino e Pesqui Complete listing at https://bgp.nsrc.org/REN/BDREN/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 554 551 Kenya Education Network - Kenya Education Netwo 7497 469 445 CSTNET-AS-AP - Computer Network Information Cen 2018 375 306 Tertiary Education and Research Network of Sout 5786 197 196 UPRENET - University of Puerto Rico, PR 1659 227 192 ERX-TANET-ASN1 - Taiwan Academic Network (TANet 58647 185 183 KAGAWAU-AS - Kagawa University, JP 1916 219 179 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 2920 225 176 LACOE - Los Angeles County Office of Education, 2907 615 142 SINET-AS - Research Organization of Information 18558 140 135 NETBLK-RCOEK - Riverside County Office of Educa Complete listing at https://bgp.nsrc.org/REN/BDREN/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/BDREN/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 164.160.192.0/21 Origin: 37661 Nigerian Research and Education Network 164.160.192.0/21 Transit: 37288 West and Central African Research Networ 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 202.14.117.0/24 Origin: 17827 STOU-AS-TH - Sukhothai Thammathirat Open 202.14.117.0/24 Transit: 4621 UNINET-AS-AP - UNINET-TH, TH Complete listing at https://bgp.nsrc.org/REN/BDREN/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 /17:413 /18:464 /19:585 /20:834 /21:896 /22:1509 /23:1703 /24:10851 /25:16 /26:19 /27:18 /28:6 /29:8 /30:17 /31:6 /32:3 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 530 554 Kenya Education Network - Kenya Education Network, KE 8895 94 97 ISU - King Abdul Aziz City for Science and Technology, SA 2152 88 731 CENIC-2152 - CENIC, US 31638 50 50 ASN-LEPIDA - Lepida S.c.p.A., IT 37215 40 46 Malawi Research and Education Network - MAREN - Malawi Research and Education Network - MAREN, MW 200521 34 58 SEAP-AGE - Ministerio de Transformacion Digital y de la Funcion Publica, 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 AS61468 - CEDIA, EC Complete listing at https://bgp.nsrc.org/REN/BDREN/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 5:21 6:5 8:13 12:1 14:94 18:2 23:20 24:3 31:2 35:3 37:27 38:11 40:1 41:235 42:8 44:8 45:43 46:6 47:1 49:12 50:7 59:18 60:6 61:3 62:7 63:36 64:45 65:8 66:60 67:40 68:11 69:22 70:3 71:1 72:6 74:40 76:25 77:4 78:3 79:6 80:9 81:29 82:3 83:7 84:5 85:26 86:4 87:1 89:17 90:1 91:34 92:1 93:17 94:7 96:5 97:1 98:3 101:2 102:5 103:310 104:85 107:13 108:8 109:13 111:3 113:2 114:21 116:9 117:5 118:35 119:36 121:3 122:8 123:6 124:42 125:1 126:1 128:58 129:63 130:107 131:80 132:48 133:160 134:131 136:199 137:123 138:12 139:5 140:84 141:11 142:34 143:28 144:2 145:15 146:128 147:70 148:12 149:12 150:43 151:8 152:130 153:27 154:45 155:92 156:125 157:25 158:27 159:112 160:36 161:40 162:23 163:107 164:13 165:52 166:1 167:35 168:104 169:7 170:22 171:1 172:1 173:7 174:1 175:4 177:5 179:12 180:12 181:1 182:3 184:4 185:50 186:5 187:8 188:21 190:25 191:13 192:1477 193:316 194:119 195:96 196:148 197:341 198:584 199:280 200:307 201:6 202:560 203:426 204:398 205:187 206:200 207:366 208:39 209:165 210:225 211:14 212:135 213:8 214:8 216:87 217:23 218:21 219:6 220:14 222:2 223:16 End of report