IPv4 R&E Routing Table Report 22:10 GMT Sat 29 Mar, 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: 26767 Prefixes after maximum aggregation (per Origin AS): 13181 Deaggregation factor: 2.03 Unique aggregates announced (without unneeded subnets): 15031 Number of IPv4 prefixes with a valid ROA: 15168 Number of IPv4 prefixes with an invalid ROA: 177 Number of IPv4 prefixes with no ROA: 11422 Total ASes present in the Internet Routing Table: 2818 Prefixes per ASN: 9.50 Origin-only ASes present in the Internet Routing Table: 2442 Origin ASes announcing only one prefix: 1085 Transit ASes present in the Internet Routing Table: 376 Transit-only ASes present in the Internet Routing Table: 70 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: 21 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 1 Number of instances of unregistered ASNs: 1 Number of 32-bit ASNs allocated by the RIRs: 46117 Number of 32-bit ASNs visible in the Routing Table: 713 Prefixes from 32-bit ASNs in the Routing Table: 4981 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: 9 Number of addresses announced to Internet: 242694295 Equivalent to 14 /8s, 119 /16s and 56 /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: 3753 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4922 Total APNIC prefixes after maximum aggregation: 2328 APNIC Deaggregation factor: 2.11 Prefixes being announced from the APNIC address blocks: 4994 Unique aggregates announced from the APNIC address blocks: 2735 APNIC Region origin ASes present in the Internet Routing Table: 601 APNIC Prefixes per ASN: 8.31 APNIC Region origin ASes announcing only one prefix: 248 APNIC Region transit ASes present in the Internet Routing Table: 52 Average APNIC Region AS path length visible: 5.8 Max APNIC Region AS path length visible: 15 Number of APNIC region 32-bit ASNs visible in the Routing Table: 242 Number of APNIC addresses announced to Internet: 45622848 Equivalent to 2 /8s, 184 /16s and 38 /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: 15569 Total ARIN prefixes after maximum aggregation: 7164 ARIN Deaggregation factor: 2.17 Prefixes being announced from the ARIN address blocks: 15265 Unique aggregates announced from the ARIN address blocks: 8042 ARIN Region origin ASes present in the Internet Routing Table: 1297 ARIN Prefixes per ASN: 11.77 ARIN Region origin ASes announcing only one prefix: 464 ARIN Region transit ASes present in the Internet Routing Table: 164 Average ARIN Region AS path length visible: 4.4 Max ARIN Region AS path length visible: 18 Number of ARIN region 32-bit ASNs visible in the Routing Table: 230 Number of ARIN addresses announced to Internet: 132397889 Equivalent to 7 /8s, 228 /16s and 59 /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: 3661 Total RIPE prefixes after maximum aggregation: 2915 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3873 Unique aggregates announced from the RIPE address blocks: 3241 RIPE Region origin ASes present in the Internet Routing Table: 660 RIPE Prefixes per ASN: 5.87 RIPE Region origin ASes announcing only one prefix: 289 RIPE Region transit ASes present in the Internet Routing Table: 103 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: 152 Number of RIPE addresses announced to Internet: 58153872 Equivalent to 3 /8s, 119 /16s and 91 /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: 1466 Total LACNIC prefixes after maximum aggregation: 599 LACNIC Deaggregation factor: 2.45 Prefixes being announced from the LACNIC address blocks: 1476 Unique aggregates announced from the LACNIC address blocks: 770 LACNIC Region origin ASes present in the Internet Routing Table: 138 LACNIC Prefixes per ASN: 10.70 LACNIC Region origin ASes announcing only one prefix: 54 LACNIC Region transit ASes present in the Internet Routing Table: 26 Average LACNIC Region AS path length visible: 4.5 Max LACNIC Region AS path length visible: 15 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 60 Number of LACNIC addresses announced to Internet: 4101254 Equivalent to 0 /8s, 62 /16s and 148 /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: 1148 Total AfriNIC prefixes after maximum aggregation: 174 AfriNIC Deaggregation factor: 6.60 Prefixes being announced from the AfriNIC address blocks: 1150 Unique aggregates announced from the AfriNIC address blocks: 234 AfriNIC Region origin ASes present in the Internet Routing Table: 51 AfriNIC Prefixes per ASN: 22.55 AfriNIC Region origin ASes announcing only one prefix: 30 AfriNIC Region transit ASes present in the Internet Routing Table: 11 Average AfriNIC Region AS path length visible: 5.2 Max AfriNIC Region AS path length visible: 21 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 29 Number of AfriNIC addresses announced to Internet: 2414080 Equivalent to 0 /8s, 36 /16s and 214 /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 639 2170 465 SINET-AS Research Organization of Informa 7497 452 180 24 CSTNET-AS-AP Computer Network Information 1237 196 74 146 KREONET-AS-KR KISTI, KR 4538 195 4192 73 ERX-CERNET-BKB China Education and Resear 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 174 297 117 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 NKN-CORE-NW NKN Core Network, IN 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 66 37 9 UNINET-AS-AP UNINET-, TH 1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA 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 2946 3649 460 GOOGLE-CLOUD-PLATFORM, US 16509 2401 1840 1086 AMAZON-02, US 14618 1038 4446 797 AMAZON-AES, US 15169 939 2007 68 GOOGLE, US 376 201 162 151 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 2152 148 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 519 34 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 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 786 196 1750 188 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 108 24 5 ISU Internet Services Unit ISU, SA 1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 89 26 69 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 3267 80 29 70 NIKS, RU 1930 79 88 74 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 311 178 43 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 119 25 55 Red Universitaria Nacional, CL 27947 115 0 89 Telconet S.A, EC 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 52 100 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 543 82 3 KENET-AS, KE 2018 373 318 68 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 13 8 5 NRaE1-AS, NG 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 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 2946 3649 460 GOOGLE-CLOUD-PLATFORM, US 16509 2401 1840 1086 AMAZON-02, US 14618 1038 4446 797 AMAZON-AES, US 15169 939 2007 68 GOOGLE, US 2907 639 2170 465 SINET-AS Research Organization of Informa 36914 543 82 3 KENET-AS, KE 7497 452 180 24 CSTNET-AS-AP Computer Network Information 2018 373 318 68 TENET-1, ZA 1916 311 178 43 Rede Nacional de Ensino e Pesquisa, BR 680 284 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 2401 1315 AMAZON-02, US 15169 939 871 GOOGLE, US 36914 543 540 KENET-AS, KE 7497 452 428 CSTNET-AS-AP Computer Network Information Cente 2018 373 305 TENET-1, ZA 1916 311 268 Rede Nacional de Ensino e Pesquisa, BR 14618 1038 241 AMAZON-AES, US 5786 199 198 UPRENET, PR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2907 639 174 SINET-AS Research Organization of Information a 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 Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 103.165.160.0/24 Origin: 16509 AMAZON-02, US 103.165.160.0/24 Transit: 27750 Cooperacion Latino Americana de Redes Av 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 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 /13:38 /14:85 /15:160 /16:2101 /17:522 /18:529 /19:767 /20:2801 /21:1097 /22:1647 /23:1805 /24:14831 /25:66 /26:81 /27:37 /28:18 /29:74 /30:36 /31:40 /32:6 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 519 543 KENET-AS, KE 16509 388 2401 AMAZON-02, US 14618 325 1038 AMAZON-AES, US 396982 270 2946 GOOGLE-CLOUD-PLATFORM, US 15169 269 939 GOOGLE, US 8895 105 108 ISU Internet Services Unit ISU, SA 27947 90 115 Telconet S.A, EC 1916 75 311 Rede Nacional de Ensino e Pesquisa, BR 23024 38 99 OCDE, US 3267 36 80 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 3:103 5:24 8:28 12:2 13:49 14:93 15:76 16:119 18:82 23:118 24:3 31:5 34:24 35:63 36:1 37:8 38:11 40:5 41:219 42:18 43:2 44:4 45:70 46:9 47:1 49:8 50:7 52:549 54:163 57:8 58:15 59:20 60:6 61:3 62:9 63:36 64:153 65:24 66:89 67:67 68:16 69:43 70:35 71:3 72:15 74:154 75:1 76:41 77:12 78:3 79:9 80:14 81:24 82:7 83:8 84:7 85:57 86:5 87:6 88:1 89:19 91:54 92:7 93:46 94:4 95:2 96:8 97:1 98:11 99:48 101:4 102:12 103:391 104:252 107:38 108:109 109:8 111:21 113:1 114:32 115:1 116:11 117:63 118:34 119:30 121:29 122:8 123:8 124:42 125:5 128:57 129:46 130:145 131:67 132:66 133:157 134:110 135:4 136:307 137:66 138:61 139:22 140:43 141:11 142:323 143:26 144:44 145:3 146:147 147:75 148:206 149:16 150:70 151:41 152:149 153:15 154:47 155:110 156:139 157:35 158:37 159:156 160:35 161:32 162:93 163:69 164:23 165:68 166:2 167:24 168:156 169:13 170:92 171:2 172:113 173:111 174:2 175:16 176:3 177:7 178:1 179:10 180:16 182:12 184:8 185:108 186:3 187:18 188:19 189:3 190:2 191:13 192:1541 193:321 194:127 195:83 196:149 197:331 198:503 199:335 200:293 201:37 202:644 203:440 204:399 205:161 206:234 207:252 208:149 209:206 210:225 211:4 212:149 213:15 216:213 217:24 218:23 219:6 220:17 222:4 223:15 End of report