IPv4 R&E Routing Table Report 22:05 GMT Fri 03 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: 23901 Prefixes after maximum aggregation (per Origin AS): 13417 Deaggregation factor: 1.78 Unique aggregates announced (without unneeded subnets): 15892 Number of IPv4 prefixes with a valid ROA: 9618 Number of IPv4 prefixes with an invalid ROA: 67 Number of IPv4 prefixes with no ROA: 14216 Total ASes present in the Internet Routing Table: 2816 Prefixes per ASN: 8.49 Origin-only ASes present in the Internet Routing Table: 2428 Origin ASes announcing only one prefix: 1070 Transit ASes present in the Internet Routing Table: 388 Transit-only ASes present in the Internet Routing Table: 74 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: 41344 Number of 32-bit ASNs visible in the Routing Table: 646 Prefixes from 32-bit ASNs in the Routing Table: 1799 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: 296746496 Equivalent to 17 /8s, 175 /16s and 254 /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: 3135 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4693 Total APNIC prefixes after maximum aggregation: 2293 APNIC Deaggregation factor: 2.05 Prefixes being announced from the APNIC address blocks: 4800 Unique aggregates announced from the APNIC address blocks: 2741 APNIC Region origin ASes present in the Internet Routing Table: 575 APNIC Prefixes per ASN: 8.35 APNIC Region origin ASes announcing only one prefix: 245 APNIC Region transit ASes present in the Internet Routing Table: 65 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: 224 Number of APNIC addresses announced to Internet: 47103232 Equivalent to 2 /8s, 206 /16s and 189 /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: 13394 Total ARIN prefixes after maximum aggregation: 7557 ARIN Deaggregation factor: 1.77 Prefixes being announced from the ARIN address blocks: 13070 Unique aggregates announced from the ARIN address blocks: 9080 ARIN Region origin ASes present in the Internet Routing Table: 1274 ARIN Prefixes per ASN: 10.26 ARIN Region origin ASes announcing only one prefix: 445 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: 188 Number of ARIN addresses announced to Internet: 174955008 Equivalent to 10 /8s, 109 /16s and 154 /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: 3565 Total RIPE prefixes after maximum aggregation: 2859 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3782 Unique aggregates announced from the RIPE address blocks: 3145 RIPE Region origin ASes present in the Internet Routing Table: 682 RIPE Prefixes per ASN: 5.55 RIPE Region origin ASes announcing only one prefix: 302 RIPE Region transit ASes present in the Internet Routing Table: 100 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: 144 Number of RIPE addresses announced to Internet: 67448064 Equivalent to 4 /8s, 5 /16s and 45 /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: 1202 Total LACNIC prefixes after maximum aggregation: 492 LACNIC Deaggregation factor: 2.44 Prefixes being announced from the LACNIC address blocks: 1202 Unique aggregates announced from the LACNIC address blocks: 628 LACNIC Region origin ASes present in the Internet Routing Table: 153 LACNIC Prefixes per ASN: 7.86 LACNIC Region origin ASes announcing only one prefix: 54 LACNIC Region transit ASes present in the Internet Routing Table: 21 Average LACNIC Region AS path length visible: 4.7 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: 4451072 Equivalent to 0 /8s, 67 /16s and 235 /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: 1041 Total AfriNIC prefixes after maximum aggregation: 210 AfriNIC Deaggregation factor: 4.96 Prefixes being announced from the AfriNIC address blocks: 1042 Unique aggregates announced from the AfriNIC address blocks: 293 AfriNIC Region origin ASes present in the Internet Routing Table: 53 AfriNIC Prefixes per ASN: 19.66 AfriNIC Region origin ASes announcing only one prefix: 24 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: 2787584 Equivalent to 0 /8s, 42 /16s and 137 /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 185 74 134 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 3971 4573 1763 AMAZON-02, US 14618 746 3996 554 AMAZON-AES, US 8075 322 12787 276 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 216 702 180 DNIC-AS-00668, US 376 199 178 149 RISQ-AS, CA 5786 199 16 1 UPRENET, PR 2152 149 507 91 CSUNET-NW, US 18558 134 18 4 NETBLK-RCOEK, US 270 120 329 85 AS270, US 23024 112 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 680 283 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 96 1518 85 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 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 45 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 263282 37 5 12 FUNDACAO UNIVERSIDADE DO OESTE DE SANTA 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 379 319 72 TENET-1, ZA 36914 253 82 3 KENET-AS, KE 2561 67 4 34 EUN, EG 327687 60 28 3 RENU, UG 8094 47 48 18 PUKNET, ZA 327700 33 16 1 MoRENet, MZ 3208 32 2 1 ARN, DZ 37182 32 8 1 TERNET, TZ 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 3971 4573 1763 AMAZON-02, US 14618 746 3996 554 AMAZON-AES, US 2907 591 2157 463 SINET-AS Research Organization of Infor 7497 435 182 24 CSTNET-AS-AP Computer Network Informati 2018 379 319 72 TENET-1, ZA 8075 322 12787 276 MICROSOFT-CORP-MSN-AS-BLOCK, US 680 283 1919 249 DFN Verein zur Foerderung eines Deutsch 36914 253 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 379 307 TENET-1, ZA 36914 253 250 KENET-AS, KE 5786 199 198 UPRENET, PR 14618 746 192 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 /15:200 /16:2147 /17:484 /18:486 /19:623 /20:1033 /21:1161 /22:1860 /23:1968 /24:13778 /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 704 3971 AMAZON-02, US 14618 247 746 AMAZON-AES, US 36914 240 253 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 8075 52 322 MICROSOFT-CORP-MSN-AS-BLOCK, US 23024 51 112 OCDE, US 32440 35 56 LONI, US 18632 34 65 VOLCANO-VISION, US 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 46115 32 35 LUTHER, US 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 13:189 14:88 15:126 16:26 18:176 23:49 24:3 31:7 35:15 37:1 38:9 40:1 41:138 42:10 44:5 45:60 46:11 47:1 49:7 50:10 52:870 54:265 58:2 59:20 60:4 61:3 62:18 63:42 64:147 65:40 66:84 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 99:81 101:6 102:16 103:351 104:116 107:17 108:83 109:12 110:2 111:17 113:4 114:23 115:1 116:8 117:61 118:32 119:21 121:28 122:11 123:8 124:39 125:4 128:86 129:50 130:149 131:74 132:50 133:157 134:101 135:4 136:215 137:105 138:15 139:18 140:55 141:5 142:56 143:40 144:64 145:6 146:133 147:64 148:51 149:16 150:138 151:15 152:83 153:14 154:30 155:76 156:71 157:40 158:43 159:156 160:32 161:36 162:70 163:89 164:22 165:60 166:1 167:25 168:173 169:14 170:151 171:1 172:10 173:22 174:2 175:31 176:13 177:9 178:2 179:11 180:14 181:1 182:1 184:4 185:87 186:3 187:19 188:15 189:3 190:18 191:36 192:1527 193:352 194:137 195:88 196:167 197:157 198:565 199:344 200:219 201:38 202:639 203:439 204:385 205:170 206:216 207:189 208:127 209:142 210:186 211:17 212:175 213:16 214:8 216:166 217:11 218:22 219:6 220:17 222:5 223:4 End of report