IPv4 R&E Routing Table Report 22:10 GMT Sat 13 Sep, 2025 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: 26860 Prefixes after maximum aggregation (per Origin AS): 13297 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 15296 Number of IPv4 prefixes with a valid ROA: 16091 Number of IPv4 prefixes with an invalid ROA: 172 Number of IPv4 prefixes with no ROA: 10597 Total ASes present in the Internet Routing Table: 2823 Prefixes per ASN: 9.51 Origin-only ASes present in the Internet Routing Table: 2449 Origin ASes announcing only one prefix: 1096 Transit ASes present in the Internet Routing Table: 374 Transit-only ASes present in the Internet Routing Table: 63 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: 17 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 33 Number of instances of unregistered ASNs: 33 Number of 32-bit ASNs allocated by the RIRs: 47403 Number of 32-bit ASNs visible in the Routing Table: 734 Prefixes from 32-bit ASNs in the Routing Table: 5336 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: 13 Number of addresses announced to Internet: 241653867 Equivalent to 14 /8s, 103 /16s and 88 /24s Percentage of available address space announced: 6.5 Percentage of allocated address space announced: 6.5 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: 3833 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4857 Total APNIC prefixes after maximum aggregation: 2369 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4945 Unique aggregates announced from the APNIC address blocks: 2776 APNIC Region origin ASes present in the Internet Routing Table: 606 APNIC Prefixes per ASN: 8.16 APNIC Region origin ASes announcing only one prefix: 250 APNIC Region transit ASes present in the Internet Routing Table: 53 Average APNIC Region AS path length visible: 5.9 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 249 Number of APNIC addresses announced to Internet: 44552000 Equivalent to 2 /8s, 167 /16s and 207 /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: 15686 Total ARIN prefixes after maximum aggregation: 7229 ARIN Deaggregation factor: 2.17 Prefixes being announced from the ARIN address blocks: 15347 Unique aggregates announced from the ARIN address blocks: 8216 ARIN Region origin ASes present in the Internet Routing Table: 1295 ARIN Prefixes per ASN: 11.85 ARIN Region origin ASes announcing only one prefix: 466 ARIN Region transit ASes present in the Internet Routing Table: 157 Average ARIN Region AS path length visible: 4.4 Max ARIN Region AS path length visible: 16 Number of ARIN region 32-bit ASNs visible in the Routing Table: 233 Number of ARIN addresses announced to Internet: 132288545 Equivalent to 7 /8s, 226 /16s and 144 /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: 3694 Total RIPE prefixes after maximum aggregation: 2930 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3953 Unique aggregates announced from the RIPE address blocks: 3306 RIPE Region origin ASes present in the Internet Routing Table: 670 RIPE Prefixes per ASN: 5.90 RIPE Region origin ASes announcing only one prefix: 300 RIPE Region transit ASes present in the Internet Routing Table: 108 Average RIPE Region AS path length visible: 4.9 Max RIPE Region AS path length visible: 16 Number of RIPE region 32-bit ASNs visible in the Routing Table: 162 Number of RIPE addresses announced to Internet: 58219792 Equivalent to 3 /8s, 120 /16s and 93 /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: 1411 Total LACNIC prefixes after maximum aggregation: 587 LACNIC Deaggregation factor: 2.40 Prefixes being announced from the LACNIC address blocks: 1421 Unique aggregates announced from the LACNIC address blocks: 748 LACNIC Region origin ASes present in the Internet Routing Table: 133 LACNIC Prefixes per ASN: 10.68 LACNIC Region origin ASes announcing only one prefix: 52 LACNIC Region transit ASes present in the Internet Routing Table: 28 Average LACNIC Region AS path length visible: 4.6 Max LACNIC Region AS path length visible: 17 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 57 Number of LACNIC addresses announced to Internet: 4083962 Equivalent to 0 /8s, 62 /16s and 80 /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: 1179 Total AfriNIC prefixes after maximum aggregation: 177 AfriNIC Deaggregation factor: 6.66 Prefixes being announced from the AfriNIC address blocks: 1181 Unique aggregates announced from the AfriNIC address blocks: 238 AfriNIC Region origin ASes present in the Internet Routing Table: 54 AfriNIC Prefixes per ASN: 21.87 AfriNIC Region origin ASes announcing only one prefix: 28 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 5.7 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 33 Number of AfriNIC addresses announced to Internet: 2496768 Equivalent to 0 /8s, 38 /16s and 25 /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 608 2169 461 SINET-AS Research Organization of Informa 7497 452 180 23 CSTNET-AS-AP Computer Network Information 1237 196 73 150 KREONET-AS-KR KISTI, KR 4538 184 4192 72 ERX-CERNET-BKB China Education and Resear 58647 179 18 2 KAGAWAU-AS Kagawa University, JP 7575 170 281 114 AARNET-AS-AP Australian Academic and Rese 55824 150 19 22 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 67 37 9 UNINET-AS-AP UNINET-, TH 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 396982 3228 3858 444 GOOGLE-CLOUD-PLATFORM, US 16509 2438 1919 1117 AMAZON-02, US 14618 1143 4735 879 AMAZON-AES, US 15169 799 183 41 GOOGLE, US 376 200 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 178 34 7 LACOE, US 2152 148 491 97 CENIC-2152, US 18558 138 18 4 NETBLK-RCOEK, US 81 127 471 35 NCREN, US 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 680 283 1883 250 DFN Verein zur Foerderung eines Deutschen 786 190 1742 185 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Switch, Swiss Academic and Researc 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 99 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 92 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 77 88 72 RCCN Fundacao para a Ciencia e a Tecnolog 3267 77 29 70 NIKS, RU 553 75 366 75 BELWUE BelWue-Koordination, DE 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 291 177 43 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 120 25 53 Red Universitaria Nacional, CL 27947 109 0 86 Telconet S.A, EC 271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 53 100 36 Fundacao Carlos Chagas Filho de Amparo a 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/CEDIA/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 565 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 39 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 327700 11 16 1 MoRENet, MZ 37654 10 1 6 RwEdNet-AS, RW 36982 8 33 8 UCT, ZA 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 396982 3228 3858 444 GOOGLE-CLOUD-PLATFORM, US 16509 2438 1919 1117 AMAZON-02, US 14618 1143 4735 879 AMAZON-AES, US 15169 799 183 41 GOOGLE, US 2907 608 2169 461 SINET-AS Research Organization of Informa 36914 565 82 3 KENET-AS, KE 7497 452 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 291 177 43 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/CEDIA/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 16509 2438 1321 AMAZON-02, US 15169 799 758 GOOGLE, US 36914 565 562 KENET-AS, KE 7497 452 429 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1143 264 AMAZON-AES, US 1916 291 248 Rede Nacional de Ensino e Pesquisa, BR 5786 198 197 UPRENET, PR 58647 179 177 KAGAWAU-AS Kagawa University, JP 2920 178 171 LACOE, US 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, US 26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.80.0/24 3112 OARNET-AS-1, US 26898 UNALLOCATED 208.108.81.0/24 3112 OARNET-AS-1, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 67.158.57.0/24 Origin: 14618 AMAZON-AES, US 67.158.57.0/24 Transit: 16509 AMAZON-02, US 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 185.131.202.0/24 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US 185.131.202.0/24 Transit: 15169 GOOGLE, US 192.225.212.0/24 Origin: 14618 AMAZON-AES, US 192.225.212.0/24 Transit: 16509 AMAZON-02, 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 /11:4 /12:20 /13:37 /14:83 /15:161 /16:2079 /17:534 /18:532 /19:790 /20:2813 /21:1058 /22:1638 /23:1791 /24:14943 /25:71 /26:87 /27:50 /28:21 /29:65 /30:35 /31:41 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 541 565 KENET-AS, KE 16509 378 2438 AMAZON-02, US 14618 352 1143 AMAZON-AES, US 396982 293 3228 GOOGLE-CLOUD-PLATFORM, US 15169 273 799 GOOGLE, US 8895 105 108 ISU Internet Services Unit ISU, SA 27947 88 109 Telconet S.A, EC 1916 87 291 Rede Nacional de Ensino e Pesquisa, BR 31638 44 44 ASN-LEPIDA, IT 200521 34 59 SEAP-AGE, ES Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:6 2:1 3:109 5:27 8:28 12:2 13:53 14:93 15:78 16:119 18:78 23:116 24:5 31:5 34:25 35:72 36:1 37:26 38:11 40:5 41:230 42:18 43:2 44:6 45:66 46:10 47:1 49:12 50:12 52:547 54:168 57:5 58:14 59:20 60:6 61:3 62:9 63:36 64:155 65:22 66:99 67:68 68:20 69:52 70:27 71:2 72:19 74:158 75:1 76:32 77:11 78:3 79:12 80:16 81:27 82:7 83:8 84:7 85:55 86:6 87:5 88:1 89:27 91:54 92:7 93:47 94:3 95:2 96:8 97:1 98:11 99:51 101:3 102:14 103:394 104:251 107:38 108:97 109:12 111:5 113:2 114:29 116:10 117:63 118:34 119:31 121:13 122:8 123:8 124:42 125:5 128:59 129:49 130:132 131:71 132:65 133:153 134:119 135:4 136:305 137:70 138:14 139:17 140:44 141:11 142:327 143:28 144:55 145:13 146:146 147:68 148:209 149:16 150:37 151:45 152:147 153:37 154:41 155:114 156:132 157:38 158:38 159:180 160:35 161:45 162:96 163:83 164:21 165:67 166:2 167:39 168:158 169:12 170:88 171:1 172:133 173:116 174:2 175:16 176:3 177:4 178:1 179:10 180:16 181:1 182:12 184:3 185:114 186:4 187:19 188:26 190:2 191:13 192:1578 193:313 194:130 195:84 196:149 197:349 198:493 199:337 200:295 201:21 202:642 203:445 204:400 205:154 206:232 207:258 208:153 209:178 210:222 211:3 212:152 213:16 216:213 217:26 218:23 219:7 220:16 222:4 223:16 End of report