IPv4 R&E Routing Table Report 22:10 GMT Sat 10 Oct, 2026 IPv4 BGP Table (R&E) as seen at CEDIA. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/CEDIA/ Analysis Summary ---------------- BGP routing table entries examined: 22896 Prefixes after maximum aggregation (per Origin AS): 13149 Deaggregation factor: 1.74 Unique aggregates announced (without unneeded subnets): 15407 Number of IPv4 prefixes with a valid ROA: 13867 Number of IPv4 prefixes with an invalid ROA: 167 Number of IPv4 prefixes with no ROA: 8862 Total ASes present in the Internet Routing Table: 2734 Prefixes per ASN: 8.37 Origin-only ASes present in the Internet Routing Table: 2369 Origin ASes announcing only one prefix: 1080 Transit ASes present in the Internet Routing Table: 365 Transit-only ASes present in the Internet Routing Table: 69 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 4.6 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: 720 Prefixes from 32-bit ASNs in the Routing Table: 1933 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: 7 Number of addresses announced to Internet: 225380696 Equivalent to 13 /8s, 111 /16s and 9 /24s Percentage of available address space announced: 6.1 Percentage of allocated address space announced: 6.1 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: 3377 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4546 Total APNIC prefixes after maximum aggregation: 2201 APNIC Deaggregation factor: 2.07 Prefixes being announced from the APNIC address blocks: 4584 Unique aggregates announced from the APNIC address blocks: 2558 APNIC Region origin ASes present in the Internet Routing Table: 559 APNIC Prefixes per ASN: 8.20 APNIC Region origin ASes announcing only one prefix: 242 APNIC Region transit ASes present in the Internet Routing Table: 47 Average APNIC Region AS path length visible: 5.2 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: 45348160 Equivalent to 2 /8s, 179 /16s and 245 /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: 12475 Total ARIN prefixes after maximum aggregation: 7508 ARIN Deaggregation factor: 1.66 Prefixes being announced from the ARIN address blocks: 12191 Unique aggregates announced from the ARIN address blocks: 8934 ARIN Region origin ASes present in the Internet Routing Table: 1321 ARIN Prefixes per ASN: 9.23 ARIN Region origin ASes announcing only one prefix: 486 ARIN Region transit ASes present in the Internet Routing Table: 163 Average ARIN Region AS path length visible: 4.5 Max ARIN Region AS path length visible: 47 Number of ARIN region 32-bit ASNs visible in the Routing Table: 246 Number of ARIN addresses announced to Internet: 116654017 Equivalent to 6 /8s, 243 /16s and 255 /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: 3483 Total RIPE prefixes after maximum aggregation: 2754 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3712 Unique aggregates announced from the RIPE address blocks: 3054 RIPE Region origin ASes present in the Internet Routing Table: 617 RIPE Prefixes per ASN: 6.02 RIPE Region origin ASes announcing only one prefix: 285 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: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 167 Number of RIPE addresses announced to Internet: 57395072 Equivalent to 3 /8s, 107 /16s and 199 /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: 1169 Total LACNIC prefixes after maximum aggregation: 488 LACNIC Deaggregation factor: 2.40 Prefixes being announced from the LACNIC address blocks: 1176 Unique aggregates announced from the LACNIC address blocks: 561 LACNIC Region origin ASes present in the Internet Routing Table: 120 LACNIC Prefixes per ASN: 9.80 LACNIC Region origin ASes announcing only one prefix: 44 LACNIC Region transit ASes present in the Internet Routing Table: 18 Average LACNIC Region AS path length visible: 3.7 Max LACNIC Region AS path length visible: 9 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 56 Number of LACNIC addresses announced to Internet: 3508439 Equivalent to 0 /8s, 53 /16s and 136 /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: 195 AfriNIC Deaggregation factor: 6.26 Prefixes being announced from the AfriNIC address blocks: 1226 Unique aggregates announced from the AfriNIC address blocks: 293 AfriNIC Region origin ASes present in the Internet Routing Table: 45 AfriNIC Prefixes per ASN: 27.24 AfriNIC Region origin ASes announcing only one prefix: 23 AfriNIC Region transit ASes present in the Internet Routing Table: 13 Average AfriNIC Region AS path length visible: 3.9 Max AfriNIC Region AS path length visible: 8 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 20 Number of AfriNIC addresses announced to Internet: 2471168 Equivalent to 0 /8s, 37 /16s and 181 /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 665 2153 465 SINET-AS Research Organization of Informa 7497 467 212 24 CSTNET-AS-AP Computer Network Information 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 151 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 1659 71 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 6262 63 134 56 CSIRO Commonwealth Scientific and Industr Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 2977 2343 1613 AMAZON-02 - Amazon.com, Inc., US 14618 1470 5311 1089 AMAZON-AES - Amazon.com, Inc., US 376 196 146 148 RISQ-AS - Reseau dInformations Scientifiq 2920 172 34 7 LACOE - Los Angeles County Office of Educ 5786 168 16 1 UPRENET - University of Puerto Rico, PR 2152 148 491 97 CENIC-2152 - CENIC, US 18558 139 18 4 NETBLK-RCOEK - Riverside County Office of 81 122 439 41 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 10430 90 132 87 WA-K20 - Washington State K-20 Telecommun Complete listing at https://bgp.nsrc.org/REN/CEDIA/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/CEDIA/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 308 161 43 Rede Nacional de Ensino e Pesquisa, BR 11340 118 25 52 Red Universitaria Nacional, CL 27947 116 0 96 Telconet S.A, EC 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 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, 27820 20 0 1 Universidad Tecnica Particular de Loja, E Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 545 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 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 2977 2343 1613 AMAZON-02 - Amazon.com, Inc., US 14618 1470 5311 1089 AMAZON-AES - Amazon.com, Inc., US 2907 665 2153 465 SINET-AS Research Organization of Informa 36914 545 82 3 KENET-AS, KE 7497 467 212 24 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 308 161 43 Rede Nacional de Ensino e Pesquisa, BR 680 294 1884 255 DFN Verein zur Foerderung eines Deutschen 786 209 1682 191 JANET Jisc Services Limited, GB 1237 199 72 154 KREONET-AS-KR KISTI, KR Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 545 542 KENET-AS, KE 7497 467 443 CSTNET-AS-AP Computer Network Information Cente 14618 1470 381 AMAZON-AES - Amazon.com, Inc., US 2018 375 306 TENET-1, ZA 1916 308 265 Rede Nacional de Ensino e Pesquisa, BR 2907 665 200 SINET-AS Research Organization of Information a 58647 185 183 KAGAWAU-AS Kagawa University, JP 5786 168 167 UPRENET - University of Puerto Rico, PR 2920 172 165 LACOE - Los Angeles County Office of Education, 18558 139 135 NETBLK-RCOEK - Riverside County Office of Educa Complete listing at https://bgp.nsrc.org/REN/CEDIA/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/CEDIA/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 199.175.42.0/24 Origin: 14618 AMAZON-AES - Amazon.com, Inc., US 199.175.42.0/24 Transit: 16509 AMAZON-02 - Amazon.com, Inc., US 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 U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH 208.78.4.0/23 Origin: 14618 AMAZON-AES - Amazon.com, Inc., US 208.78.4.0/23 Transit: 16509 AMAZON-02 - Amazon.com, Inc., US Complete listing at https://bgp.nsrc.org/REN/CEDIA/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 /11:2 /12:18 /13:31 /14:55 /15:157 /16:1942 /17:437 /18:499 /19:630 /20:938 /21:979 /22:1618 /23:1740 /24:13423 /25:65 /26:85 /27:50 /28:23 /29:65 /30:38 /31:43 /32:56 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 16509 563 2977 AMAZON-02 - Amazon.com, Inc., US 36914 521 545 KENET-AS, KE 14618 401 1470 AMAZON-AES - Amazon.com, Inc., US 27947 97 116 Telconet S.A, EC 8895 95 98 ISU Internet Services Unit ISU, SA 1916 89 308 Rede Nacional de Ensino e Pesquisa, BR 2907 59 665 SINET-AS Research Organization of Information and Systems, National Institute of Informatics, JP 31638 50 50 ASN-LEPIDA, IT 37215 40 46 MAREN, MW 200521 33 57 SEAP-AGE, ES Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:19 3:248 5:30 8:2 12:1 13:99 14:93 15:160 16:61 18:176 23:141 24:14 31:8 35:47 37:27 38:12 40:7 41:234 42:8 44:8 45:72 46:8 47:1 49:12 50:7 52:392 54:49 59:18 60:6 61:3 62:6 63:52 64:124 65:23 66:100 67:63 68:22 69:55 70:3 71:2 72:24 74:75 75:3 76:30 77:6 78:4 79:6 80:10 81:29 82:6 83:7 84:10 85:30 86:4 87:3 88:1 89:23 91:43 92:3 93:49 94:8 95:3 96:9 97:1 98:12 99:65 101:2 102:8 103:331 104:120 107:16 108:86 109:16 110:1 111:3 113:2 114:17 116:12 117:7 118:35 119:36 121:4 122:8 123:6 124:42 125:1 126:1 128:57 129:61 130:137 131:76 132:48 133:160 134:134 135:4 136:200 137:75 138:15 139:16 140:44 141:16 142:53 143:33 144:16 145:17 146:143 147:77 148:24 149:22 150:44 151:33 152:141 153:80 154:44 155:142 156:127 157:42 158:34 159:201 160:38 161:44 162:70 163:114 164:27 165:73 166:2 167:50 168:146 169:14 170:82 171:1 172:7 173:29 174:3 175:4 176:2 177:9 178:2 179:9 180:12 181:1 182:3 184:8 185:80 186:5 187:1 188:23 190:3 191:14 192:1523 193:323 194:104 195:94 196:148 197:332 198:520 199:322 200:299 201:3 202:555 203:428 204:392 205:161 206:228 207:271 208:108 209:124 210:216 211:15 212:139 213:20 216:189 217:27 218:21 219:6 220:14 222:2 223:16 End of report