IPv4 R&E Routing Table Report 22:05 GMT Thu 13 Feb, 2025 IPv4 BGP Table (R&E) as seen at CENIC. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/CENIC/ Analysis Summary ---------------- BGP routing table entries examined: 20197 Prefixes after maximum aggregation (per Origin AS): 11458 Deaggregation factor: 1.76 Unique aggregates announced (without unneeded subnets): 12796 Number of IPv4 prefixes with a valid ROA: 8379 Number of IPv4 prefixes with an invalid ROA: 8 Number of IPv4 prefixes with no ROA: 11810 Total ASes present in the Internet Routing Table: 2822 Prefixes per ASN: 7.16 Origin-only ASes present in the Internet Routing Table: 2437 Origin ASes announcing only one prefix: 1090 Transit ASes present in the Internet Routing Table: 385 Transit-only ASes present in the Internet Routing Table: 73 Paths with bogon ASNs present in the IPv4 Routing Table: 5 Average AS path length visible in the Internet Routing Table: 4.2 Max AS path length visible: 20 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: 46117 Number of 32-bit ASNs visible in the Routing Table: 672 Prefixes from 32-bit ASNs in the Routing Table: 1810 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: 270881024 Equivalent to 16 /8s, 37 /16s and 81 /24s Percentage of available address space announced: 7.3 Percentage of allocated address space announced: 7.3 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: 2475 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4731 Total APNIC prefixes after maximum aggregation: 2275 APNIC Deaggregation factor: 2.08 Prefixes being announced from the APNIC address blocks: 4794 Unique aggregates announced from the APNIC address blocks: 2709 APNIC Region origin ASes present in the Internet Routing Table: 567 APNIC Prefixes per ASN: 8.46 APNIC Region origin ASes announcing only one prefix: 243 APNIC Region transit ASes present in the Internet Routing Table: 58 Average APNIC Region AS path length visible: 4.5 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 212 Number of APNIC addresses announced to Internet: 47213312 Equivalent to 2 /8s, 208 /16s and 107 /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: 9207 Total ARIN prefixes after maximum aggregation: 5610 ARIN Deaggregation factor: 1.64 Prefixes being announced from the ARIN address blocks: 8837 Unique aggregates announced from the ARIN address blocks: 5890 ARIN Region origin ASes present in the Internet Routing Table: 1306 ARIN Prefixes per ASN: 6.77 ARIN Region origin ASes announcing only one prefix: 462 ARIN Region transit ASes present in the Internet Routing Table: 163 Average ARIN Region AS path length visible: 3.7 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 213 Number of ARIN addresses announced to Internet: 135618560 Equivalent to 8 /8s, 21 /16s and 96 /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: 3600 Total RIPE prefixes after maximum aggregation: 2856 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3903 Unique aggregates announced from the RIPE address blocks: 3258 RIPE Region origin ASes present in the Internet Routing Table: 666 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: 108 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 154 Number of RIPE addresses announced to Internet: 80683008 Equivalent to 4 /8s, 207 /16s and 32 /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: 1475 Total LACNIC prefixes after maximum aggregation: 540 LACNIC Deaggregation factor: 2.73 Prefixes being announced from the LACNIC address blocks: 1476 Unique aggregates announced from the LACNIC address blocks: 709 LACNIC Region origin ASes present in the Internet Routing Table: 157 LACNIC Prefixes per ASN: 9.40 LACNIC Region origin ASes announcing only one prefix: 56 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 5.2 Max LACNIC Region AS path length visible: 14 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 65 Number of LACNIC addresses announced to Internet: 4727296 Equivalent to 0 /8s, 72 /16s and 34 /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: 1180 Total AfriNIC prefixes after maximum aggregation: 173 AfriNIC Deaggregation factor: 6.82 Prefixes being announced from the AfriNIC address blocks: 1184 Unique aggregates announced from the AfriNIC address blocks: 227 AfriNIC Region origin ASes present in the Internet Routing Table: 51 AfriNIC Prefixes per ASN: 23.22 AfriNIC Region origin ASes announcing only one prefix: 30 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 4.8 Max AfriNIC Region AS path length visible: 20 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 2636288 Equivalent to 0 /8s, 40 /16s and 58 /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 626 2202 463 SINET-AS Research Organization of Informa 7497 450 180 24 CSTNET-AS-AP Computer Network Information 1237 192 74 146 KREONET-AS-KR KISTI, KR 58647 183 18 2 KAGAWAU-AS Kagawa University, JP 7575 173 297 116 AARNET-AS-AP Australian Academic and Rese 55824 147 19 21 NKN-CORE-NW NKN Core Network, IN 4538 140 4192 71 ERX-CERNET-BKB China Education and Resear 4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha 4621 69 37 10 UNINET-AS-AP UNINET-, TH 23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR Complete listing at https://bgp.nsrc.org/REN/CENIC/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8075 714 16017 603 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 210 647 178 DNIC-AS-00668, US 376 201 162 150 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2920 173 34 7 LACOE, US 2152 152 507 97 CENIC-2152, US 18558 139 18 4 NETBLK-RCOEK, US 81 129 519 34 NCREN, US 270 117 328 81 AS270, US 23024 97 7 17 OCDE, US Complete listing at https://bgp.nsrc.org/REN/CENIC/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 786 207 1755 184 JANET Jisc Services Limited, GB 559 114 533 104 SWITCH Peering requests: peering@switch.c 8895 110 24 5 ISU Internet Services Unit ISU, SA 1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 93 26 73 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog 553 78 462 78 BELWUE BelWue-Koordination, DE 3267 78 29 68 NIKS, RU Complete listing at https://bgp.nsrc.org/REN/CENIC/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 235 178 42 Rede Nacional de Ensino e Pesquisa, BR 28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M 11340 109 25 52 Red Universitaria Nacional, CL 271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 4270 53 16 1 Red de Interconexion Universitaria, AR 61468 52 5 17 CEDIA, EC 2715 49 99 35 Fundacao Carlos Chagas Filho de Amparo a 19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR 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/CENIC/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 36914 550 82 3 KENET-AS, KE 2018 379 319 71 TENET-1, ZA 8094 47 48 18 PUKNET, ZA 37182 36 8 1 TERNET, TZ 37215 34 8 1 MAREN, MW 6879 24 2 9 ENSTINET-, EG 37661 12 8 4 NRaE1-AS, NG 37501 11 49 6 UOFS, ZA 327700 10 16 1 MoRENet, MZ 36982 8 33 8 UCT, ZA Complete listing at https://bgp.nsrc.org/REN/CENIC/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 8075 714 16017 603 MICROSOFT-CORP-MSN-AS-BLOCK, US 2907 626 2202 463 SINET-AS Research Organization of Informa 36914 550 82 3 KENET-AS, KE 7497 450 180 24 CSTNET-AS-AP Computer Network Information 2018 379 319 71 TENET-1, ZA 680 284 1899 249 DFN Verein zur Foerderung eines Deutschen 1916 235 178 42 Rede Nacional de Ensino e Pesquisa, BR 668 210 647 178 DNIC-AS-00668, US 786 207 1755 184 JANET Jisc Services Limited, GB 376 201 162 150 RISQ-AS, CA Complete listing at https://bgp.nsrc.org/REN/CENIC/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 36914 550 547 KENET-AS, KE 7497 450 426 CSTNET-AS-AP Computer Network Information Cente 2018 379 308 TENET-1, ZA 5786 198 197 UPRENET, PR 1916 235 193 Rede Nacional de Ensino e Pesquisa, BR 58647 183 181 KAGAWAU-AS Kagawa University, JP 2920 173 166 LACOE, US 2907 626 163 SINET-AS Research Organization of Information a 18558 139 135 NETBLK-RCOEK, US 55824 147 126 NKN-CORE-NW NKN Core Network, IN Complete listing at https://bgp.nsrc.org/REN/CENIC/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 65208 PRIVATE 63.225.1.0/24 11570 AS11570, US 26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US 65208 PRIVATE 206.206.156.0/22 11570 AS11570, US 65208 PRIVATE 216.161.32.0/23 11570 AS11570, US Complete listing at https://bgp.nsrc.org/REN/CENIC/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 The University 203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res Complete listing at https://bgp.nsrc.org/REN/CENIC/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 /10:3 /11:7 /12:25 /13:31 /14:61 /15:157 /16:2203 /17:444 /18:475 /19:595 /20:883 /21:904 /22:1492 /23:1584 /24:11332 /25:0 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 526 550 KENET-AS, KE 8075 126 714 MICROSOFT-CORP-MSN-AS-BLOCK, US 8895 107 110 ISU Internet Services Unit ISU, SA 23024 36 97 OCDE, US 37182 35 36 TERNET, TZ 3267 34 78 NIKS, RU 32440 33 58 LONI, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 200521 32 57 SEAP-AGE, ES Complete listing at https://bgp.nsrc.org/REN/CENIC/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 2:1 4:2 5:16 6:4 8:2 12:1 13:31 14:93 23:12 24:3 31:2 35:15 37:8 38:11 40:1 41:256 42:11 44:4 45:58 46:5 47:1 49:11 50:6 52:6 59:19 60:6 61:3 62:15 63:38 64:52 65:5 66:60 67:45 68:17 69:28 70:2 71:1 72:9 74:60 76:37 77:10 78:3 79:10 80:14 81:26 82:7 83:9 84:5 85:51 86:6 87:1 89:10 91:46 92:4 93:14 94:6 95:3 96:5 97:1 98:2 102:13 103:311 104:82 107:2 108:11 109:5 111:22 113:5 114:24 116:9 117:61 118:33 119:30 121:27 122:8 123:8 124:42 125:5 128:60 129:40 130:97 131:74 132:64 133:156 134:109 135:4 136:198 137:55 138:64 139:5 140:33 141:4 142:46 143:25 144:29 145:6 146:137 147:62 148:200 149:14 150:75 151:13 152:136 153:14 154:45 155:73 156:130 157:28 158:32 159:118 160:34 161:28 162:34 163:67 164:16 165:53 166:2 167:29 168:119 169:7 170:116 171:1 172:2 173:7 175:16 176:1 177:6 178:2 179:9 180:16 181:1 182:11 184:6 185:79 186:3 187:22 188:16 189:3 190:34 191:13 192:1532 193:311 194:134 195:78 196:148 197:333 198:497 199:303 200:332 201:37 202:645 203:451 204:379 205:142 206:215 207:228 208:76 209:128 210:220 211:3 212:153 213:11 214:9 216:102 217:14 218:23 219:6 220:16 222:2 223:15 End of report