IPv4 R&E Routing Table Report 22:05 GMT Thu 09 Mar, 2023 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: 24141 Prefixes after maximum aggregation (per Origin AS): 13511 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 16076 Number of IPv4 prefixes with a valid ROA: 9651 Number of IPv4 prefixes with an invalid ROA: 69 Number of IPv4 prefixes with no ROA: 14421 Total ASes present in the Internet Routing Table: 2822 Prefixes per ASN: 8.55 Origin-only ASes present in the Internet Routing Table: 2435 Origin ASes announcing only one prefix: 1076 Transit ASes present in the Internet Routing Table: 387 Transit-only ASes present in the Internet Routing Table: 71 Paths with bogon ASNs present in the IPv4 Routing Table: 3 Average AS path length visible in the Internet Routing Table: 4.0 Max AS path length visible: 19 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 6 Number of instances of unregistered ASNs: 6 Number of 32-bit ASNs allocated by the RIRs: 41390 Number of 32-bit ASNs visible in the Routing Table: 652 Prefixes from 32-bit ASNs in the Routing Table: 1807 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: 5 Number of addresses announced to Internet: 296944896 Equivalent to 17 /8s, 179 /16s and 5 /24s Percentage of available address space announced: 8.0 Percentage of allocated address space announced: 8.0 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: 3129 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4712 Total APNIC prefixes after maximum aggregation: 2306 APNIC Deaggregation factor: 2.04 Prefixes being announced from the APNIC address blocks: 4820 Unique aggregates announced from the APNIC address blocks: 2751 APNIC Region origin ASes present in the Internet Routing Table: 577 APNIC Prefixes per ASN: 8.35 APNIC Region origin ASes announcing only one prefix: 247 APNIC Region transit ASes present in the Internet Routing Table: 64 Average APNIC Region AS path length visible: 4.3 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 226 Number of APNIC addresses announced to Internet: 47363328 Equivalent to 2 /8s, 210 /16s and 181 /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, 131072-151865 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: 13483 Total ARIN prefixes after maximum aggregation: 7576 ARIN Deaggregation factor: 1.78 Prefixes being announced from the ARIN address blocks: 13157 Unique aggregates announced from the ARIN address blocks: 9098 ARIN Region origin ASes present in the Internet Routing Table: 1281 ARIN Prefixes per ASN: 10.27 ARIN Region origin ASes announcing only one prefix: 449 ARIN Region transit ASes present in the Internet Routing Table: 168 Average ARIN Region AS path length visible: 3.6 Max ARIN Region AS path length visible: 19 Number of ARIN region 32-bit ASNs visible in the Routing Table: 195 Number of ARIN addresses announced to Internet: 174849024 Equivalent to 10 /8s, 107 /16s and 252 /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, 393216-401308 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, 47/8, 48/8, 50/8, 52/8, 53/8, 54/8, 55/8, 56/8, 57/8, 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: 3558 Total RIPE prefixes after maximum aggregation: 2853 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3776 Unique aggregates announced from the RIPE address blocks: 3144 RIPE Region origin ASes present in the Internet Routing Table: 679 RIPE Prefixes per ASN: 5.56 RIPE Region origin ASes announcing only one prefix: 300 RIPE Region transit ASes present in the Internet Routing Table: 99 Average RIPE Region AS path length visible: 4.6 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 141 Number of RIPE addresses announced to Internet: 67447040 Equivalent to 4 /8s, 5 /16s and 41 /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 196608-213403 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 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: 1358 Total LACNIC prefixes after maximum aggregation: 564 LACNIC Deaggregation factor: 2.41 Prefixes being announced from the LACNIC address blocks: 1358 Unique aggregates announced from the LACNIC address blocks: 785 LACNIC Region origin ASes present in the Internet Routing Table: 157 LACNIC Prefixes per ASN: 8.65 LACNIC Region origin ASes announcing only one prefix: 57 LACNIC Region transit ASes present in the Internet Routing Table: 23 Average LACNIC Region AS path length visible: 5.1 Max LACNIC Region AS path length visible: 12 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 62 Number of LACNIC addresses announced to Internet: 4499456 Equivalent to 0 /8s, 68 /16s and 168 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-273820 + 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: 1024 Total AfriNIC prefixes after maximum aggregation: 206 AfriNIC Deaggregation factor: 4.97 Prefixes being announced from the AfriNIC address blocks: 1025 Unique aggregates announced from the AfriNIC address blocks: 293 AfriNIC Region origin ASes present in the Internet Routing Table: 52 AfriNIC Prefixes per ASN: 19.71 AfriNIC Region origin ASes announcing only one prefix: 23 AfriNIC Region transit ASes present in the Internet Routing Table: 12 Average AfriNIC Region AS path length visible: 4.0 Max AfriNIC Region AS path length visible: 15 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 28 Number of AfriNIC addresses announced to Internet: 2784512 Equivalent to 0 /8s, 42 /16s and 125 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 45/8, 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 591 2157 463 SINET-AS Research Organization of Infor 7497 435 182 24 CSTNET-AS-AP Computer Network Informati 1237 189 74 139 KREONET-AS-KR KISTI, KR 58647 178 18 2 KAGAWAU-AS Kagawa University, JP 7575 173 329 119 AARNET-AS-AP Australian Academic and Re 4538 130 4192 73 ERX-CERNET-BKB China Education and Rese 55824 119 18 12 NKN-CORE-NW NKN Core Network, IN 4621 70 37 10 UNINET-AS-AP UNINET-, TH 9411 66 16 2 NONTRINET-AS-AP Kasetsart University, T 4762 65 4 1 MAHIDOL-BORDER-AS Mahidol University, T 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 16509 3977 4574 1769 AMAZON-02, US 14618 747 3994 555 AMAZON-AES, US 8075 323 12787 277 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 216 702 180 DNIC-AS-00668, US 376 199 178 149 RISQ-AS, CA 5786 198 16 1 UPRENET, PR 2152 149 507 91 CSUNET-NW, US 18558 134 18 4 NETBLK-RCOEK, US 81 129 521 32 NCREN, US 270 120 329 85 AS270, 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 680 283 1919 249 DFN Verein zur Foerderung eines Deutsch 786 186 1775 183 JANET Jisc Services Limited, GB 8895 136 24 4 ISU Internet Services Unit ISU, SA 559 115 550 106 SWITCH Peering requests: peering@switch 1103 95 1518 84 SURFNET-NL SURFnet, The Netherlands, NL 2614 94 27 74 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 553 73 449 73 BELWUE BelWue-Koordination, DE 1930 65 81 60 RCCN Fundacao para a Ciencia e a Tecnol 2200 64 599 59 FR-RENATER Reseau National de telecommu 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 158 208 43 Rede Nacional de Ensino e Pesquisa, BR 28391 153 10 67 Universidad Juarez Autonoma de Tabasco, 11340 104 24 47 Red Universitaria Nacional, CL 2715 58 102 38 Fundacao Carlos Chagas Filho de Amparo 1251 57 37 19 FUNDACAO DE AMPARO A PESQUISA DO ESTADO 4270 44 16 1 Red de Interconexion Universitaria, AR 61468 42 3 14 CEDIA, EC 28614 38 2 2 Fundacao Universidade Regional de Blume 19611 37 17 2 Associacao Antonio Vieira - Unisinos, B 28571 37 40 18 UNIVERSIDADE DE SAO PAULO, BR 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 2018 370 319 72 TENET-1, ZA 36914 247 82 3 KENET-AS, KE 2561 67 4 34 EUN, EG 327687 61 28 3 RENU, UG 8094 48 48 15 PUKNET, ZA 37182 33 8 1 TERNET, TZ 3208 32 2 1 ARN, DZ 327700 29 16 1 MoRENet, MZ 6879 24 2 9 ENSTINET-, EG 37074 13 8 2 UG-AS, GH 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 16509 3977 4574 1769 AMAZON-02, US 14618 747 3994 555 AMAZON-AES, US 2907 591 2157 463 SINET-AS Research Organization of Infor 7497 435 182 24 CSTNET-AS-AP Computer Network Informati 2018 370 319 72 TENET-1, ZA 8075 323 12787 277 MICROSOFT-CORP-MSN-AS-BLOCK, US 680 283 1919 249 DFN Verein zur Foerderung eines Deutsch 36914 247 82 3 KENET-AS, KE 668 216 702 180 DNIC-AS-00668, US 376 199 178 149 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 7497 435 411 CSTNET-AS-AP Computer Network Information Cente 2018 370 298 TENET-1, ZA 36914 247 244 KENET-AS, KE 5786 198 197 UPRENET, PR 14618 747 192 AMAZON-AES, US 58647 178 176 KAGAWAU-AS Kagawa University, JP 8895 136 132 ISU Internet Services Unit ISU, SA 18558 134 130 NETBLK-RCOEK, US 2907 591 128 SINET-AS Research Organization of Information a 1916 158 115 Rede Nacional de Ensino e Pesquisa, BR 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 65300 PRIVATE 103.252.172.0/22 133465 DKU-AS-AP Duke Kunshan Unive 394607 UNALLOCATED 104.249.65.0/24 23024 OCDE, US 18621 UNALLOCATED 142.156.0.0/16 26677 ORION-ASN, CA 33008 UNALLOCATED 162.248.66.0/24 11096 FLORIDANET, US 19658 UNALLOCATED 199.27.241.0/24 11096 FLORIDANET, US 394607 UNALLOCATED 216.100.93.0/24 23024 OCDE, US Complete listing at https://bgp.nsrc.org/REN/CENIC/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 64.186.3.0/24 Origin: 16509 AMAZON-02, US 64.186.3.0/24 Transit: 2152 CSUNET-NW, US 102.36.194.0/23 Origin: 2018 TENET-1, ZA 102.36.194.0/23 Transit: 11537 INTERNET2-RESEARCH-EDU, US 192.31.196.0/24 Origin: 112 UNASSIGNED 192.31.196.0/24 Transit: 1103 SURFNET-NL SURFnet, The Netherlands, NL 198.135.168.0/24 Origin: 14618 AMAZON-AES, US 198.135.168.0/24 Transit: 16509 AMAZON-02, US 216.169.147.0/24 Origin: 14618 AMAZON-AES, US 216.169.147.0/24 Transit: 16509 AMAZON-02, US 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 /10:4 /11:9 /12:29 /13:36 /14:82 /15:201 /16:2149 /17:489 /18:489 /19:629 /20:1032 /21:1164 /22:1864 /23:1971 /24:13992 /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 16509 707 3977 AMAZON-02, US 14618 247 747 AMAZON-AES, US 36914 234 247 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 8075 53 323 MICROSOFT-CORP-MSN-AS-BLOCK, US 23024 52 113 OCDE, US 32440 35 56 LONI, US 18632 34 66 VOLCANO-VISION, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 37182 32 33 TERNET, TZ Complete listing at https://bgp.nsrc.org/REN/CENIC/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:2 2:1 3:89 4:2 5:17 6:4 8:2 12:1 13:186 14:89 15:126 16:26 18:176 23:49 24:3 31:7 35:15 37:1 38:9 40:1 41:132 42:10 44:5 45:52 46:11 47:1 49:7 50:11 52:868 54:265 58:2 59:20 60:4 61:3 62:18 63:42 64:147 65:38 66:86 67:65 68:18 69:49 70:27 71:48 72:18 74:84 76:46 77:11 78:4 79:10 80:17 81:28 82:6 83:6 84:8 85:46 86:5 87:2 88:1 89:13 91:54 92:2 93:4 94:8 95:2 96:6 97:2 98:13 99:81 101:6 102:16 103:350 104:116 107:17 108:83 109:12 110:2 111:17 113:4 114:23 115:1 116:8 117:61 118:32 119:21 121:27 122:11 123:8 124:39 125:4 128:86 129:50 130:151 131:74 132:50 133:157 134:99 135:4 136:214 137:106 138:15 139:18 140:55 141:5 142:56 143:40 144:67 145:4 146:134 147:65 148:204 149:16 150:138 151:15 152:148 153:14 154:30 155:76 156:71 157:45 158:43 159:156 160:32 161:36 162:70 163:89 164:22 165:60 166:1 167:25 168:165 169:14 170:150 171:1 172:10 173:22 174:2 175:31 176:13 177:9 178:2 179:11 180:14 181:1 182:1 184:4 185:88 186:3 187:19 188:15 189:3 190:18 191:36 192:1536 193:355 194:136 195:87 196:166 197:154 198:563 199:345 200:220 201:39 202:644 203:445 204:386 205:170 206:216 207:189 208:124 209:144 210:186 211:17 212:172 213:16 214:7 216:167 217:11 218:22 219:6 220:17 222:5 223:4 End of report