IPv4 R&E Routing Table Report 22:10 GMT Wed 21 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: 22822 Prefixes after maximum aggregation (per Origin AS): 13128 Deaggregation factor: 1.74 Unique aggregates announced (without unneeded subnets): 15305 Number of IPv4 prefixes with a valid ROA: 13865 Number of IPv4 prefixes with an invalid ROA: 176 Number of IPv4 prefixes with no ROA: 8781 Total ASes present in the Internet Routing Table: 2713 Prefixes per ASN: 8.41 Origin-only ASes present in the Internet Routing Table: 2353 Origin ASes announcing only one prefix: 1073 Transit ASes present in the Internet Routing Table: 360 Transit-only ASes present in the Internet Routing Table: 64 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: 2 Number of instances of unregistered ASNs: 2 Number of 32-bit ASNs allocated by the RIRs: 51778 Number of 32-bit ASNs visible in the Routing Table: 713 Prefixes from 32-bit ASNs in the Routing Table: 1903 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: 225567754 Equivalent to 13 /8s, 113 /16s and 228 /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: 3273 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4543 Total APNIC prefixes after maximum aggregation: 2206 APNIC Deaggregation factor: 2.06 Prefixes being announced from the APNIC address blocks: 4581 Unique aggregates announced from the APNIC address blocks: 2565 APNIC Region origin ASes present in the Internet Routing Table: 554 APNIC Prefixes per ASN: 8.27 APNIC Region origin ASes announcing only one prefix: 237 APNIC Region transit ASes present in the Internet Routing Table: 48 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: 226 Number of APNIC addresses announced to Internet: 45345088 Equivalent to 2 /8s, 179 /16s and 233 /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: 12465 Total ARIN prefixes after maximum aggregation: 7497 ARIN Deaggregation factor: 1.66 Prefixes being announced from the ARIN address blocks: 12182 Unique aggregates announced from the ARIN address blocks: 8838 ARIN Region origin ASes present in the Internet Routing Table: 1318 ARIN Prefixes per ASN: 9.24 ARIN Region origin ASes announcing only one prefix: 486 ARIN Region transit ASes present in the Internet Routing Table: 160 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: 244 Number of ARIN addresses announced to Internet: 116712449 Equivalent to 6 /8s, 244 /16s and 228 /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: 3437 Total RIPE prefixes after maximum aggregation: 2731 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3664 Unique aggregates announced from the RIPE address blocks: 3028 RIPE Region origin ASes present in the Internet Routing Table: 609 RIPE Prefixes per ASN: 6.02 RIPE Region origin ASes announcing only one prefix: 284 RIPE Region transit ASes present in the Internet Routing Table: 98 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: 57320832 Equivalent to 3 /8s, 106 /16s and 165 /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: 1195 Total LACNIC prefixes after maximum aggregation: 500 LACNIC Deaggregation factor: 2.39 Prefixes being announced from the LACNIC address blocks: 1202 Unique aggregates announced from the LACNIC address blocks: 573 LACNIC Region origin ASes present in the Internet Routing Table: 121 LACNIC Prefixes per ASN: 9.93 LACNIC Region origin ASes announcing only one prefix: 44 LACNIC Region transit ASes present in the Internet Routing Table: 21 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: 3705673 Equivalent to 0 /8s, 56 /16s and 139 /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: 1180 Total AfriNIC prefixes after maximum aggregation: 192 AfriNIC Deaggregation factor: 6.15 Prefixes being announced from the AfriNIC address blocks: 1186 Unique aggregates announced from the AfriNIC address blocks: 294 AfriNIC Region origin ASes present in the Internet Routing Table: 45 AfriNIC Prefixes per ASN: 26.36 AfriNIC Region origin ASes announcing only one prefix: 22 AfriNIC Region transit ASes present in the Internet Routing Table: 13 Average AfriNIC Region AS path length visible: 3.8 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: 2479872 Equivalent to 0 /8s, 37 /16s and 215 /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 2152 465 SINET-AS - Research Organization of Infor 7497 468 212 24 CSTNET-AS-AP - Computer Network Informati 1237 200 72 155 KREONET-AS-KR-KR - KISTI, KR 58647 185 18 2 KAGAWAU-AS - Kagawa University, JP 7575 168 281 115 AARNET-AS-AP - Australian Academic and Re 55824 152 19 20 NKN-CORE-NW - NKN Core Network, IN 4538 133 4191 71 ERX-CERNET-BKB - China Education and Rese 4762 75 4 1 MAHIDOL-BORDER-AS - Mahidol University, T 1659 71 1466 35 ERX-TANET-ASN1 - Taiwan Academic Network 6262 63 134 56 CSIRO - Commonwealth Scientific and Indus 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 2924 2343 1627 AMAZON-02 - Amazon.com, Inc., US 14618 1522 5311 1092 AMAZON-AES - Amazon.com, Inc., US 5786 197 16 1 UPRENET - University of Puerto Rico, PR 376 196 146 148 RISQ-AS - Reseau d'Informations Scientifi 2920 172 34 7 LACOE - Los Angeles County Office of Educ 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 680 299 1885 258 DFN - Verein zur Foerderung eines Deutsch 786 206 1681 188 JANET - Jisc Services Limited, GB 559 117 533 106 Switch - SWITCH, CH 1103 99 1758 84 SURFNET-NL - SURF B.V., NL 8895 98 24 5 ISU - King Abdul Aziz City for Science an 2614 87 26 67 RoEduNet - Agentia de Administrare a Rete 137 82 677 77 ASGARR - Consortium GARR, IT 1930 78 88 73 RCCN - Fundacao para a Ciencia e a Tecnol 553 75 366 75 BELWUE - Universitaet Stuttgart, DE 2200 68 623 62 FR-RENATER - Renater, FR 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 AS1916 - Rede Nacional de Ensino e Pesqui 11340 118 25 52 AS11340 - Red Universitaria Nacional, CL 27947 117 0 96 AS27947 - Telconet S.A, EC 271640 62 8 1 AS271640 - UNIVERSIDADE FEDERAL DE VICOSA 2715 60 84 40 AS2715 - Fundacao Carlos Chagas Filho de 19611 53 17 2 AS19611 - Associacao Antonio Vieira - Uni 1251 37 31 26 AS1251 - FUNDACAO DE AMPARO A PESQUISA DO 21612 27 16 1 AS21612 - FUNDACAO INSTITUTO OSWALDO CRUZ 20191 26 16 1 AS20191 - Pontificia Universidad Catolica 61468 25 0 19 AS61468 - CEDIA, EC 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 Kenya Education Network - Kenya Education 2018 375 318 69 Tertiary Education and Research Network o 2561 68 4 34 Egyptian Universities Network (EUN) - Egy 8094 51 48 11 North West University - North West Univer 6879 24 2 9 ENSTINET - ENSTINET, EG 327700 14 16 1 Mozambique Research & Education Network - 30983 12 4 2 CNRST (Centre National pour la Recherche 37501 11 49 6 University of the Free State - University 37654 10 1 6 Rwanda Ministry of Education - Rwanda Min 36982 8 33 8 University of Cape Town - University of C 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 2924 2343 1627 AMAZON-02 - Amazon.com, Inc., US 14618 1522 5311 1092 AMAZON-AES - Amazon.com, Inc., US 2907 665 2152 465 SINET-AS - Research Organization of Infor 36914 545 82 3 Kenya Education Network - Kenya Education 7497 468 212 24 CSTNET-AS-AP - Computer Network Informati 2018 375 318 69 Tertiary Education and Research Network o 1916 308 161 43 AS1916 - Rede Nacional de Ensino e Pesqui 680 299 1885 258 DFN - Verein zur Foerderung eines Deutsch 786 206 1681 188 JANET - Jisc Services Limited, GB 1237 200 72 155 KREONET-AS-KR-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 Kenya Education Network - Kenya Education Netwo 7497 468 444 CSTNET-AS-AP - Computer Network Information Cen 14618 1522 430 AMAZON-AES - Amazon.com, Inc., US 2018 375 306 Tertiary Education and Research Network of Sout 1916 308 265 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 2907 665 200 SINET-AS - Research Organization of Information 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 185 183 KAGAWAU-AS - Kagawa University, JP 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 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 Nigerian Research and Education Network 164.160.192.0/21 Transit: 37288 West and Central African Research Networ 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 202.14.117.0/24 Transit: 4621 UNINET-AS-AP - UNINET-TH, 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 /14:57 /15:157 /16:1946 /17:438 /18:497 /19:629 /20:931 /21:978 /22:1621 /23:1737 /24:13347 /25:63 /26:87 /27:50 /28:24 /29:69 /30:39 /31:42 /32:57 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 16509 530 2924 AMAZON-02 - Amazon.com, Inc., US 36914 523 545 Kenya Education Network - Kenya Education Network, KE 14618 402 1522 AMAZON-AES - Amazon.com, Inc., US 27947 97 117 AS27947 - Telconet S.A, EC 8895 95 98 ISU - King Abdul Aziz City for Science and Technology, SA 1916 89 308 AS1916 - Rede Nacional de Ensino e Pesquisa, BR 2907 59 665 SINET-AS - Research Organization of Information and Systems, National Institute of Informatics, JP 31638 48 48 ASN-LEPIDA - Lepida S.c.p.A., IT 200521 32 55 SEAP-AGE - Ministerio de Transformacion Digital y de la Funcion Publica, ES 25977 30 44 HCCS - HOUSTON COMMUNITY COLLEGE SYSTEM, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:19 3:202 5:30 8:2 12:1 13:99 14:94 15:160 16:113 18:153 23:138 24:13 31:8 35:49 37:26 38:11 40:7 41:195 42:8 44:8 45:69 46:7 47:1 49:12 50:8 52:392 54:67 59:18 60:6 61:3 62:6 63:52 64:125 65:23 66:102 67:63 68:22 69:53 70:3 71:2 72:24 74:75 75:3 76:30 77:6 78:4 79:7 80:10 81:27 82:4 83:7 84:10 85:30 86:4 87:1 88:1 89:24 91:40 92:2 93:47 94:8 95:3 96:9 97:1 98:12 99:63 101:2 102:8 103:325 104:119 107:16 108:53 109:16 110:1 111:3 113:2 114:21 116:12 117:7 118:35 119:36 121:4 122:8 123:6 124:41 125:1 126:1 128:57 129:59 130:138 131:76 132:59 133:160 134:131 135:4 136:229 137:75 138:14 139:16 140:44 141:17 142:55 143:33 144:16 145:16 146:143 147:77 148:24 149:22 150:44 151:33 152:142 153:81 154:45 155:146 156:127 157:42 158:37 159:201 160:39 161:42 162:70 163:114 164:32 165:73 166:2 167:50 168:146 169:14 170:83 171:1 172:7 173:29 174:3 175:4 176:2 177:7 178:2 179:9 180:12 181:1 182:3 184:7 185:78 186:5 187:2 188:22 190:3 191:14 192:1515 193:322 194:102 195:96 196:148 197:338 198:517 199:322 200:300 201:3 202:559 203:418 204:392 205:161 206:229 207:270 208:107 209:124 210:217 211:15 212:138 213:17 216:175 217:25 218:21 219:6 220:14 222:2 223:16 End of report