IPv4 R&E Routing Table Report 22:15 GMT Thu 23 Oct, 2025 IPv4 BGP Table (R&E) as seen at RedCLARA. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/RedCLARA/ Analysis Summary ---------------- BGP routing table entries examined: 26925 Prefixes after maximum aggregation (per Origin AS): 13178 Deaggregation factor: 2.04 Unique aggregates announced (without unneeded subnets): 15245 Number of IPv4 prefixes with a valid ROA: 16443 Number of IPv4 prefixes with an invalid ROA: 9 Number of IPv4 prefixes with no ROA: 10473 Total ASes present in the Internet Routing Table: 2822 Prefixes per ASN: 9.54 Origin-only ASes present in the Internet Routing Table: 2455 Origin ASes announcing only one prefix: 1106 Transit ASes present in the Internet Routing Table: 367 Transit-only ASes present in the Internet Routing Table: 58 Paths with bogon ASNs present in the IPv4 Routing Table: 0 Average AS path length visible in the Internet Routing Table: 3.6 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 11 Number of instances of unregistered ASNs: 11 Number of 32-bit ASNs allocated by the RIRs: 47788 Number of 32-bit ASNs visible in the Routing Table: 739 Prefixes from 32-bit ASNs in the Routing Table: 5371 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: 11 Number of addresses announced to Internet: 245652336 Equivalent to 14 /8s, 164 /16s and 91 /24s Percentage of available address space announced: 6.6 Percentage of allocated address space announced: 6.6 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: 3730 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4874 Total APNIC prefixes after maximum aggregation: 2372 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4961 Unique aggregates announced from the APNIC address blocks: 2793 APNIC Region origin ASes present in the Internet Routing Table: 607 APNIC Prefixes per ASN: 8.17 APNIC Region origin ASes announcing only one prefix: 251 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 4.4 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 251 Number of APNIC addresses announced to Internet: 44744768 Equivalent to 2 /8s, 170 /16s and 192 /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: 15835 Total ARIN prefixes after maximum aggregation: 7213 ARIN Deaggregation factor: 2.20 Prefixes being announced from the ARIN address blocks: 15463 Unique aggregates announced from the ARIN address blocks: 8201 ARIN Region origin ASes present in the Internet Routing Table: 1295 ARIN Prefixes per ASN: 11.94 ARIN Region origin ASes announcing only one prefix: 465 ARIN Region transit ASes present in the Internet Routing Table: 159 Average ARIN Region AS path length visible: 3.4 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 230 Number of ARIN addresses announced to Internet: 136154144 Equivalent to 8 /8s, 29 /16s and 140 /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: 3681 Total RIPE prefixes after maximum aggregation: 2920 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3952 Unique aggregates announced from the RIPE address blocks: 3325 RIPE Region origin ASes present in the Internet Routing Table: 669 RIPE Prefixes per ASN: 5.91 RIPE Region origin ASes announcing only one prefix: 303 RIPE Region transit ASes present in the Internet Routing Table: 107 Average RIPE Region AS path length visible: 3.9 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 163 Number of RIPE addresses announced to Internet: 58216976 Equivalent to 3 /8s, 120 /16s and 82 /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: 1324 Total LACNIC prefixes after maximum aggregation: 490 LACNIC Deaggregation factor: 2.70 Prefixes being announced from the LACNIC address blocks: 1335 Unique aggregates announced from the LACNIC address blocks: 669 LACNIC Region origin ASes present in the Internet Routing Table: 134 LACNIC Prefixes per ASN: 9.96 LACNIC Region origin ASes announcing only one prefix: 58 LACNIC Region transit ASes present in the Internet Routing Table: 24 Average LACNIC Region AS path length visible: 3.8 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 60 Number of LACNIC addresses announced to Internet: 4030976 Equivalent to 0 /8s, 61 /16s and 130 /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: 1200 Total AfriNIC prefixes after maximum aggregation: 180 AfriNIC Deaggregation factor: 6.67 Prefixes being announced from the AfriNIC address blocks: 1203 Unique aggregates announced from the AfriNIC address blocks: 246 AfriNIC Region origin ASes present in the Internet Routing Table: 56 AfriNIC Prefixes per ASN: 21.48 AfriNIC Region origin ASes announcing only one prefix: 29 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 2.8 Max AfriNIC Region AS path length visible: 9 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 35 Number of AfriNIC addresses announced to Internet: 2500608 Equivalent to 0 /8s, 38 /16s and 40 /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 611 2169 463 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 198 72 153 KREONET-AS-KR KISTI, KR 4538 184 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 169 281 113 AARNET-AS-AP Australian Academic and Rese 55824 151 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 6262 63 134 56 CSIRO Commonwealth Scientific and Industr 4621 62 36 8 UNINET-AS-AP UNINET-, TH Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 396982 3277 4825 468 GOOGLE-CLOUD-PLATFORM, US 16509 2473 1922 1118 AMAZON-02, US 14618 1160 4746 896 AMAZON-AES, US 15169 814 183 41 GOOGLE, US 376 200 162 150 RISQ-AS, CA 5786 192 16 1 UPRENET, PR 2920 177 34 7 LACOE, US 2152 149 492 98 CENIC-2152, US 18558 137 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 213 1739 190 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 106 24 5 ISU Internet Services Unit ISU, SA 1103 100 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 88 26 68 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 3267 81 29 70 NIKS, RU 1930 77 88 72 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 290 177 42 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 111 25 50 Red Universitaria Nacional, CL 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 56 84 39 Fundacao Carlos Chagas Filho de Amparo a 61468 52 3 21 CEDIA, EC 19611 49 17 2 Associacao Antonio Vieira - Unisinos, BR 3596 40 8 4 Universidad Autonoma Metropolitana, MX 28614 38 2 2 Fundacao Universidade Regional de Blumena 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 579 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 43 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 327700 12 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/RedCLARA/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 396982 3277 4825 468 GOOGLE-CLOUD-PLATFORM, US 16509 2473 1922 1118 AMAZON-02, US 14618 1160 4746 896 AMAZON-AES, US 15169 814 183 41 GOOGLE, US 2907 611 2169 463 SINET-AS Research Organization of Informa 36914 579 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 290 177 42 Rede Nacional de Ensino e Pesquisa, BR 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 16509 2473 1355 AMAZON-02, US 15169 814 773 GOOGLE, US 36914 579 576 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1160 264 AMAZON-AES, US 1916 290 248 Rede Nacional de Ensino e Pesquisa, BR 5786 192 191 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 177 170 LACOE, US Complete listing at https://bgp.nsrc.org/REN/RedCLARA/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 64011 UNALLOCATED 130.215.0.0/16 10326 WPI, US 396334 UNALLOCATED 205.143.136.0/21 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.136.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.137.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.138.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.139.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.140.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.141.0/24 5078 ONENET-AS-1, US 396334 UNALLOCATED 205.143.142.0/24 5078 ONENET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 103.177.50.0/23 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US 103.177.50.0/23 Transit: 15169 GOOGLE, US 164.160.192.0/21 Origin: 37661 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 165.101.120.0/24 Origin: 150725 NUS-AS-AP National University of Singapo 165.101.120.0/24 Transit: 23855 SINGAREN-GIX-AS-AP Singapore Advanced Re 192.225.212.0/24 Origin: 14618 AMAZON-AES, US 192.225.212.0/24 Transit: 16509 AMAZON-02, US 192.225.223.0/24 Origin: 14618 AMAZON-AES, US 192.225.223.0/24 Transit: 16509 AMAZON-02, US Complete listing at https://bgp.nsrc.org/REN/RedCLARA/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 /11:5 /12:20 /13:38 /14:85 /15:165 /16:2090 /17:545 /18:543 /19:795 /20:2817 /21:1097 /22:1665 /23:1817 /24:15031 /25:64 /26:80 /27:47 /28:6 /29:4 /30:5 /31:1 /32:3 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 555 579 KENET-AS, KE 16509 374 2473 AMAZON-02, US 14618 358 1160 AMAZON-AES, US 396982 293 3277 GOOGLE-CLOUD-PLATFORM, US 15169 273 814 GOOGLE, US 8895 103 106 ISU Internet Services Unit ISU, SA 1916 85 290 Rede Nacional de Ensino e Pesquisa, BR 31638 48 48 ASN-LEPIDA, IT 37215 37 43 MAREN, MW 3267 36 81 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/RedCLARA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:6 2:1 3:115 5:27 8:28 12:2 13:53 14:95 15:80 16:119 18:79 23:115 24:5 31:6 34:25 35:77 36:1 37:26 38:11 40:5 41:233 42:18 43:2 44:6 45:71 46:9 47:1 49:13 50:12 52:548 54:170 57:5 58:14 59:20 60:6 61:3 62:9 63:36 64:147 65:22 66:97 67:68 68:20 69:53 70:25 71:2 72:20 74:160 75:1 76:32 77:12 78:3 79:12 80:13 81:27 82:7 83:6 84:5 85:55 86:7 87:5 88:1 89:27 91:51 92:7 93:46 94:4 95:2 96:8 97:1 98:11 99:53 101:3 102:17 103:391 104:251 107:38 108:97 109:15 110:1 111:7 113:2 114:30 116:11 117:63 118:34 119:30 121:13 122:8 123:8 124:42 125:5 128:57 129:46 130:124 131:68 132:65 133:157 134:120 135:4 136:300 137:78 138:14 139:17 140:44 141:12 142:340 143:31 144:75 145:14 146:138 147:43 148:213 149:18 150:37 151:43 152:147 153:36 154:44 155:112 156:131 157:41 158:35 159:181 160:35 161:47 162:95 163:86 164:21 165:68 166:2 167:41 168:159 169:12 170:89 171:1 172:137 173:116 174:2 175:8 176:3 177:5 178:1 179:12 180:16 181:2 182:11 184:17 185:109 186:4 187:24 188:28 190:17 191:13 192:1598 193:311 194:132 195:83 196:150 197:361 198:500 199:338 200:306 201:23 202:640 203:449 204:401 205:152 206:234 207:256 208:119 209:179 210:225 211:3 212:155 213:16 216:216 217:26 218:20 219:7 220:16 222:4 223:17 End of report