IPv4 R&E Routing Table Report 22:10 GMT Wed 18 Mar, 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: 22326 Prefixes after maximum aggregation (per Origin AS): 12738 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 14596 Number of IPv4 prefixes with a valid ROA: 11885 Number of IPv4 prefixes with an invalid ROA: 172 Number of IPv4 prefixes with no ROA: 10269 Total ASes present in the Internet Routing Table: 2758 Prefixes per ASN: 8.09 Origin-only ASes present in the Internet Routing Table: 2379 Origin ASes announcing only one prefix: 1066 Transit ASes present in the Internet Routing Table: 379 Transit-only ASes present in the Internet Routing Table: 73 Paths with bogon ASNs present in the IPv4 Routing Table: 1 Average AS path length visible in the Internet Routing Table: 4.9 Max AS path length visible: 21 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 4 Number of instances of unregistered ASNs: 4 Number of 32-bit ASNs allocated by the RIRs: 49005 Number of 32-bit ASNs visible in the Routing Table: 713 Prefixes from 32-bit ASNs in the Routing Table: 1987 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: 3 Number of addresses announced to Internet: 223189575 Equivalent to 13 /8s, 77 /16s and 154 /24s Percentage of available address space announced: 6.0 Percentage of allocated address space announced: 6.0 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: 3192 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4855 Total APNIC prefixes after maximum aggregation: 2363 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4887 Unique aggregates announced from the APNIC address blocks: 2639 APNIC Region origin ASes present in the Internet Routing Table: 609 APNIC Prefixes per ASN: 8.02 APNIC Region origin ASes announcing only one prefix: 262 APNIC Region transit ASes present in the Internet Routing Table: 54 Average APNIC Region AS path length visible: 5.4 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 251 Number of APNIC addresses announced to Internet: 45482816 Equivalent to 2 /8s, 182 /16s and 3 /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: 11421 Total ARIN prefixes after maximum aggregation: 6844 ARIN Deaggregation factor: 1.67 Prefixes being announced from the ARIN address blocks: 11213 Unique aggregates announced from the ARIN address blocks: 7926 ARIN Region origin ASes present in the Internet Routing Table: 1294 ARIN Prefixes per ASN: 8.67 ARIN Region origin ASes announcing only one prefix: 462 ARIN Region transit ASes present in the Internet Routing Table: 160 Average ARIN Region AS path length visible: 4.6 Max ARIN Region AS path length visible: 21 Number of ARIN region 32-bit ASNs visible in the Routing Table: 229 Number of ARIN addresses announced to Internet: 113615137 Equivalent to 6 /8s, 197 /16s and 161 /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: 3424 Total RIPE prefixes after maximum aggregation: 2728 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3586 Unique aggregates announced from the RIPE address blocks: 2989 RIPE Region origin ASes present in the Internet Routing Table: 605 RIPE Prefixes per ASN: 5.93 RIPE Region origin ASes announcing only one prefix: 271 RIPE Region transit ASes present in the Internet Routing Table: 104 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: 156 Number of RIPE addresses announced to Internet: 57738625 Equivalent to 3 /8s, 113 /16s and 5 /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: 1400 Total LACNIC prefixes after maximum aggregation: 587 LACNIC Deaggregation factor: 2.39 Prefixes being announced from the LACNIC address blocks: 1408 Unique aggregates announced from the LACNIC address blocks: 740 LACNIC Region origin ASes present in the Internet Routing Table: 130 LACNIC Prefixes per ASN: 10.83 LACNIC Region origin ASes announcing only one prefix: 50 LACNIC Region transit ASes present in the Internet Routing Table: 30 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: 56 Number of LACNIC addresses announced to Internet: 3944549 Equivalent to 0 /8s, 60 /16s and 48 /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: 1222 Total AfriNIC prefixes after maximum aggregation: 212 AfriNIC Deaggregation factor: 5.76 Prefixes being announced from the AfriNIC address blocks: 1229 Unique aggregates announced from the AfriNIC address blocks: 299 AfriNIC Region origin ASes present in the Internet Routing Table: 43 AfriNIC Prefixes per ASN: 28.58 AfriNIC Region origin ASes announcing only one prefix: 21 AfriNIC Region transit ASes present in the Internet Routing Table: 12 Average AfriNIC Region AS path length visible: 5.8 Max AfriNIC Region AS path length visible: 11 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 21 Number of AfriNIC addresses announced to Internet: 2405888 Equivalent to 0 /8s, 36 /16s and 182 /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 661 2153 462 SINET-AS Research Organization of Informa 7497 454 180 23 CSTNET-AS-AP Computer Network Information 1237 200 72 154 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 165 281 112 AARNET-AS-AP Australian Academic and Rese 55824 152 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 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 16509 2248 2034 1262 AMAZON-02 - Amazon.com, Inc., US 14618 1252 4877 954 AMAZON-AES - Amazon.com, Inc., US 376 197 162 151 RISQ-AS - Reseau dInformations Scientifiq 5786 197 16 1 UPRENET - University of Puerto Rico, PR 2920 173 34 7 LACOE - Los Angeles County Office of Educ 2152 147 491 96 CENIC-2152 - CENIC, US 18558 140 18 4 NETBLK-RCOEK - Riverside County Office of 81 115 455 35 NCREN - MCNC, US 21976 94 34 16 NJEDGE-NET - NJEDge.Net, Inc., US 237 83 542 49 MERIT-AS-14 - Merit Network Inc., 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 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 786 209 1731 188 JANET Jisc Services Limited, GB 559 115 533 105 SWITCH Switch, Swiss Academic and Researc 8895 103 24 5 ISU Internet Services Unit ISU, SA 1103 100 1759 85 SURFNET-NL SURFnet, The Netherlands, NL 2614 87 26 67 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 78 88 73 RCCN Fundacao para a Ciencia e a Tecnolog 553 75 366 75 BELWUE BelWue-Koordination, DE 2200 64 630 59 FR-RENATER Reseau National de telecommuni 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 290 161 43 Rede Nacional de Ensino e Pesquisa, BR 28391 161 10 72 Universidad Juarez Autonoma de Tabasco, M 11340 119 25 55 Red Universitaria Nacional, CL 27947 115 0 95 Telconet S.A, EC 3596 69 8 4 Universidad Autonoma Metropolitana, MX 271640 66 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 57 84 39 Fundacao Carlos Chagas Filho de Amparo a 19611 53 17 2 Associacao Antonio Vieira - Unisinos, BR 1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S 21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR 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 553 82 3 KENET-AS, KE 2018 375 318 69 TENET-1, ZA 2561 68 4 34 EUN, EG 8094 46 48 21 PUKNET, ZA 37215 44 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 30983 12 4 2 MARWAN-AS, MA 37501 11 49 6 UOFS, ZA 327700 10 1 10 MoRENet, MZ 37182 9 8 1 TERNET, TZ 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 2248 2034 1262 AMAZON-02 - Amazon.com, Inc., US 14618 1252 4877 954 AMAZON-AES - Amazon.com, Inc., US 2907 661 2153 462 SINET-AS Research Organization of Informa 36914 553 82 3 KENET-AS, KE 7497 454 180 23 CSTNET-AS-AP Computer Network Information 2018 375 318 69 TENET-1, ZA 680 291 1883 253 DFN Verein zur Foerderung eines Deutschen 1916 290 161 43 Rede Nacional de Ensino e Pesquisa, BR 786 209 1731 188 JANET Jisc Services Limited, GB 1237 200 72 154 KREONET-AS-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 553 550 KENET-AS, KE 7497 454 431 CSTNET-AS-AP Computer Network Information Cente 2018 375 306 TENET-1, ZA 14618 1252 298 AMAZON-AES - Amazon.com, Inc., US 1916 290 247 Rede Nacional de Ensino e Pesquisa, BR 2907 661 199 SINET-AS Research Organization of Information a 5786 197 196 UPRENET - University of Puerto Rico, PR 58647 182 180 KAGAWAU-AS Kagawa University, JP 2920 173 166 LACOE - Los Angeles County Office of Education, 18558 140 136 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 64011 UNALLOCATED 130.215.0.0/16 10326 WPI - Worcester Polytec 64510 DOCUMENT 185.48.234.168/32 200999 PL-CLOUDFERRO, PL 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 NRaE1-AS, NG 164.160.192.0/21 Transit: 37288 WACREN, SN 202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U 202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH 203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP Adelaide Unive 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res 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 /12:17 /13:28 /14:50 /15:151 /16:1952 /17:443 /18:490 /19:658 /20:943 /21:979 /22:1560 /23:1693 /24:12935 /25:69 /26:85 /27:52 /28:22 /29:59 /30:38 /31:40 /32:58 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 529 553 KENET-AS, KE 16509 424 2248 AMAZON-02 - Amazon.com, Inc., US 14618 381 1252 AMAZON-AES - Amazon.com, Inc., US 8895 100 103 ISU Internet Services Unit ISU, SA 27947 92 115 Telconet S.A, EC 1916 86 290 Rede Nacional de Ensino e Pesquisa, BR 2907 59 661 SINET-AS Research Organization of Information and Systems, National Institute of Informatics, JP 31638 48 48 ASN-LEPIDA, IT 37215 38 44 MAREN, MW 32440 35 55 LONI - Louisiana Board of RegentsLouisiana Optical Network Initiative LONI, US Complete listing at https://bgp.nsrc.org/REN/CEDIA/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:11 3:134 5:26 8:13 12:2 13:66 14:95 15:91 16:15 18:88 23:47 24:12 31:5 35:36 37:26 38:12 40:5 41:229 42:17 44:6 45:56 46:6 47:1 49:13 50:8 52:360 54:42 58:14 59:20 60:6 61:3 62:6 63:34 64:120 65:21 66:92 67:63 68:20 69:50 70:3 72:22 74:87 75:1 76:41 77:6 78:3 79:5 80:8 81:27 82:5 83:6 84:10 85:30 86:4 87:1 88:1 89:24 91:47 92:2 93:46 94:3 95:2 96:9 97:1 98:10 99:52 101:5 102:8 103:369 104:115 107:9 108:24 109:14 110:1 111:7 113:2 114:24 116:11 117:7 118:33 119:27 121:18 122:8 123:8 124:42 125:5 128:58 129:52 130:122 131:73 132:65 133:157 134:118 135:4 136:219 137:73 138:12 139:17 140:43 141:11 142:51 143:28 144:17 145:7 146:144 147:76 148:246 149:20 150:37 151:29 152:132 153:61 154:43 155:117 156:125 157:43 158:37 159:178 160:36 161:41 162:64 163:87 164:20 165:69 166:3 167:35 168:146 169:13 170:83 171:1 172:10 173:25 174:2 175:15 176:2 177:6 178:1 179:9 180:16 181:1 182:11 184:3 185:68 186:4 187:3 188:24 190:2 191:13 192:1500 193:325 194:107 195:95 196:149 197:345 198:514 199:305 200:290 201:5 202:603 203:442 204:412 205:153 206:226 207:261 208:104 209:126 210:232 211:15 212:143 213:16 216:185 217:25 218:21 219:7 220:16 222:4 223:17 End of report