IPv4 R&E Routing Table Report 22:10 GMT Mon 28 Jul, 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: 26892 Prefixes after maximum aggregation (per Origin AS): 13286 Deaggregation factor: 2.02 Unique aggregates announced (without unneeded subnets): 15252 Number of IPv4 prefixes with a valid ROA: 15985 Number of IPv4 prefixes with an invalid ROA: 177 Number of IPv4 prefixes with no ROA: 10730 Total ASes present in the Internet Routing Table: 2825 Prefixes per ASN: 9.52 Origin-only ASes present in the Internet Routing Table: 2449 Origin ASes announcing only one prefix: 1092 Transit ASes present in the Internet Routing Table: 376 Transit-only ASes present in the Internet Routing Table: 66 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: 16 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: 46959 Number of 32-bit ASNs visible in the Routing Table: 729 Prefixes from 32-bit ASNs in the Routing Table: 5295 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: 12 Number of addresses announced to Internet: 242832425 Equivalent to 14 /8s, 121 /16s and 84 /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: 3841 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4898 Total APNIC prefixes after maximum aggregation: 2360 APNIC Deaggregation factor: 2.08 Prefixes being announced from the APNIC address blocks: 4982 Unique aggregates announced from the APNIC address blocks: 2790 APNIC Region origin ASes present in the Internet Routing Table: 604 APNIC Prefixes per ASN: 8.25 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: 6.0 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 248 Number of APNIC addresses announced to Internet: 45415744 Equivalent to 2 /8s, 180 /16s and 253 /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: 15649 Total ARIN prefixes after maximum aggregation: 7232 ARIN Deaggregation factor: 2.16 Prefixes being announced from the ARIN address blocks: 15325 Unique aggregates announced from the ARIN address blocks: 8189 ARIN Region origin ASes present in the Internet Routing Table: 1301 ARIN Prefixes per ASN: 11.78 ARIN Region origin ASes announcing only one prefix: 465 ARIN Region transit ASes present in the Internet Routing Table: 160 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: 232 Number of ARIN addresses announced to Internet: 132736065 Equivalent to 7 /8s, 233 /16s and 100 /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: 3673 Total RIPE prefixes after maximum aggregation: 2922 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3921 Unique aggregates announced from the RIPE address blocks: 3275 RIPE Region origin ASes present in the Internet Routing Table: 669 RIPE Prefixes per ASN: 5.86 RIPE Region origin ASes announcing only one prefix: 299 RIPE Region transit ASes present in the Internet Routing Table: 107 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: 160 Number of RIPE addresses announced to Internet: 58187280 Equivalent to 3 /8s, 119 /16s and 222 /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: 1461 Total LACNIC prefixes after maximum aggregation: 599 LACNIC Deaggregation factor: 2.44 Prefixes being announced from the LACNIC address blocks: 1471 Unique aggregates announced from the LACNIC address blocks: 757 LACNIC Region origin ASes present in the Internet Routing Table: 134 LACNIC Prefixes per ASN: 10.98 LACNIC Region origin ASes announcing only one prefix: 51 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: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 59 Number of LACNIC addresses announced to Internet: 4087960 Equivalent to 0 /8s, 62 /16s and 96 /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: 1178 Total AfriNIC prefixes after maximum aggregation: 168 AfriNIC Deaggregation factor: 7.01 Prefixes being announced from the AfriNIC address blocks: 1181 Unique aggregates announced from the AfriNIC address blocks: 230 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 24.10 AfriNIC Region origin ASes announcing only one prefix: 27 AfriNIC Region transit ASes present in the Internet Routing Table: 8 Average AfriNIC Region AS path length visible: 5.4 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 30 Number of AfriNIC addresses announced to Internet: 2394624 Equivalent to 0 /8s, 36 /16s and 138 /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 613 2169 463 SINET-AS Research Organization of Informa 7497 453 180 23 CSTNET-AS-AP Computer Network Information 1237 194 74 146 KREONET-AS-KR KISTI, KR 4538 193 4192 72 ERX-CERNET-BKB China Education and Resear 58647 182 18 2 KAGAWAU-AS Kagawa University, JP 7575 171 281 116 AARNET-AS-AP Australian Academic and Rese 55824 149 19 21 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 3198 3856 434 GOOGLE-CLOUD-PLATFORM, US 16509 2474 1915 1169 AMAZON-02, US 14618 1109 4464 854 AMAZON-AES, US 15169 787 183 41 GOOGLE, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 179 34 7 LACOE, US 2152 145 491 95 CENIC-2152, US 18558 139 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 680 287 1899 249 DFN Verein zur Foerderung eines Deutschen 786 193 1742 187 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 109 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 3267 81 29 70 NIKS, RU 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 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 328 177 43 Rede Nacional de Ensino e Pesquisa, BR 28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M 11340 119 25 55 Red Universitaria Nacional, CL 27947 114 0 91 Telconet S.A, EC 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 53 100 36 Fundacao Carlos Chagas Filho de Amparo a 19611 48 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 579 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 37 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 3198 3856 434 GOOGLE-CLOUD-PLATFORM, US 16509 2474 1915 1169 AMAZON-02, US 14618 1109 4464 854 AMAZON-AES, US 15169 787 183 41 GOOGLE, US 2907 613 2169 463 SINET-AS Research Organization of Informa 36914 579 82 3 KENET-AS, KE 7497 453 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 1916 328 177 43 Rede Nacional de Ensino e Pesquisa, BR 680 287 1899 249 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 2474 1305 AMAZON-02, US 15169 787 746 GOOGLE, US 36914 579 576 KENET-AS, KE 7497 453 430 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 1916 328 285 Rede Nacional de Ensino e Pesquisa, BR 14618 1109 255 AMAZON-AES, US 5786 199 198 UPRENET, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 179 172 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 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 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/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 /14:85 /15:161 /16:2093 /17:531 /18:536 /19:784 /20:2827 /21:1090 /22:1621 /23:1809 /24:14925 /25:68 /26:85 /27:37 /28:21 /29:72 /30:38 /31:41 /32:5 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 555 579 KENET-AS, KE 16509 392 2474 AMAZON-02, US 14618 349 1109 AMAZON-AES, US 396982 289 3198 GOOGLE-CLOUD-PLATFORM, US 15169 271 787 GOOGLE, US 8895 106 109 ISU Internet Services Unit ISU, SA 27947 91 114 Telconet S.A, EC 1916 88 328 Rede Nacional de Ensino e Pesquisa, BR 23024 38 99 OCDE, US 3267 36 81 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:6 2:1 3:118 5:24 8:28 12:2 13:60 14:93 15:78 16:119 18:87 23:115 24:3 31:5 34:24 35:74 36:1 37:14 38:11 40:5 41:227 42:18 43:2 44:5 45:71 46:10 47:1 49:12 50:11 52:550 54:163 57:7 58:15 59:20 60:6 61:3 62:9 63:36 64:156 65:23 66:96 67:68 68:19 69:49 70:28 71:2 72:19 74:154 75:1 76:22 77:11 78:3 79:12 80:15 81:27 82:7 83:8 84:7 85:58 86:6 87:5 88:2 89:21 91:53 92:7 93:47 94:3 95:2 96:8 97:1 98:11 99:48 101:3 102:12 103:401 104:249 107:38 108:111 109:12 110:1 111:21 113:2 114:29 116:10 117:63 118:34 119:31 121:29 122:8 123:8 124:42 125:5 128:59 129:50 130:137 131:71 132:68 133:156 134:116 135:4 136:307 137:68 138:14 139:17 140:42 141:12 142:327 143:29 144:44 145:5 146:146 147:68 148:208 149:15 150:38 151:40 152:148 153:15 154:40 155:111 156:138 157:38 158:36 159:177 160:35 161:31 162:94 163:83 164:21 165:65 166:2 167:37 168:149 169:12 170:89 171:1 172:125 173:118 174:2 175:16 176:3 177:5 178:1 179:10 180:16 182:12 184:7 185:114 186:4 187:19 188:21 190:2 191:13 192:1580 193:317 194:130 195:81 196:148 197:360 198:487 199:336 200:300 201:20 202:641 203:437 204:396 205:152 206:234 207:255 208:153 209:211 210:219 211:3 212:154 213:16 216:211 217:25 218:23 219:7 220:16 222:4 223:16 End of report