Global R&E Routing Table Report 20:10 GMT Sun 19 Dec, 2021 BGP Table (R&E) as seen at CERNET. Report Website: https://bgp.nsrc.org/REN Detailed Analysis: https://bgp.nsrc.org/REN/CERNET/ Analysis Summary ---------------- BGP routing table entries examined: 17248 Prefixes after maximum aggregation (per Origin AS): 9851 Deaggregation factor: 1.75 Unique aggregates announced (without unneeded subnets): 11081 Total ASes present in the Internet Routing Table: 2642 Prefixes per ASN: 6.53 Origin-only ASes present in the Internet Routing Table: 2281 Origin ASes announcing only one prefix: 1070 Transit ASes present in the Internet Routing Table: 361 Transit-only ASes present in the Internet Routing Table: 46 Average AS path length visible in the Internet Routing Table: 4.4 Max AS path length visible: 14 Max AS path prepend of ASN ( 10497) 11 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: 38132 Number of 32-bit ASNs visible in the Routing Table: 599 Prefixes from 32-bit ASNs in the Routing Table: 1648 Number of bogon 32-bit ASNs visible in the Routing Table: 0 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 2 Number of addresses announced to Internet: 196725456 Equivalent to 11 /8s, 185 /16s and 202 /24s Percentage of available address space announced: 5.3 Percentage of allocated address space announced: 5.3 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.5 Total number of prefixes smaller than registry allocations: 1979 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4038 Total APNIC prefixes after maximum aggregation: 2169 APNIC Deaggregation factor: 1.86 Prefixes being announced from the APNIC address blocks: 4040 Unique aggregates announced from the APNIC address blocks: 2576 APNIC Region origin ASes present in the Internet Routing Table: 549 APNIC Prefixes per ASN: 7.36 APNIC Region origin ASes announcing only one prefix: 238 APNIC Region transit ASes present in the Internet Routing Table: 56 Average APNIC Region AS path length visible: 4.5 Max APNIC Region AS path length visible: 13 Number of APNIC region 32-bit ASNs visible in the Routing Table: 209 Number of APNIC addresses announced to Internet: 45195520 Equivalent to 2 /8s, 177 /16s and 161 /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: 7417 Total ARIN prefixes after maximum aggregation: 4121 ARIN Deaggregation factor: 1.80 Prefixes being announced from the ARIN address blocks: 7430 Unique aggregates announced from the ARIN address blocks: 4608 ARIN Region origin ASes present in the Internet Routing Table: 1149 ARIN Prefixes per ASN: 6.47 ARIN Region origin ASes announcing only one prefix: 422 ARIN Region transit ASes present in the Internet Routing Table: 157 Average ARIN Region AS path length visible: 4.4 Max ARIN Region AS path length visible: 14 Number of ARIN region 32-bit ASNs visible in the Routing Table: 156 Number of ARIN addresses announced to Internet: 86719920 Equivalent to 5 /8s, 43 /16s and 61 /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: 3408 Total RIPE prefixes after maximum aggregation: 2775 RIPE Deaggregation factor: 1.23 Prefixes being announced from the RIPE address blocks: 3392 Unique aggregates announced from the RIPE address blocks: 2774 RIPE Region origin ASes present in the Internet Routing Table: 674 RIPE Prefixes per ASN: 5.03 RIPE Region origin ASes announcing only one prefix: 319 RIPE Region transit ASes present in the Internet Routing Table: 102 Average RIPE Region AS path length visible: 3.9 Max RIPE Region AS path length visible: 14 Number of RIPE region 32-bit ASNs visible in the Routing Table: 133 Number of RIPE addresses announced to Internet: 58149120 Equivalent to 3 /8s, 119 /16s and 73 /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: 1483 Total LACNIC prefixes after maximum aggregation: 602 LACNIC Deaggregation factor: 2.46 Prefixes being announced from the LACNIC address blocks: 1484 Unique aggregates announced from the LACNIC address blocks: 833 LACNIC Region origin ASes present in the Internet Routing Table: 177 LACNIC Prefixes per ASN: 8.38 LACNIC Region origin ASes announcing only one prefix: 72 LACNIC Region transit ASes present in the Internet Routing Table: 25 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: 76 Number of LACNIC addresses announced to Internet: 4065056 Equivalent to 0 /8s, 62 /16s and 7 /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: 900 Total AfriNIC prefixes after maximum aggregation: 182 AfriNIC Deaggregation factor: 4.95 Prefixes being announced from the AfriNIC address blocks: 900 Unique aggregates announced from the AfriNIC address blocks: 288 AfriNIC Region origin ASes present in the Internet Routing Table: 45 AfriNIC Prefixes per ASN: 20.00 AfriNIC Region origin ASes announcing only one prefix: 19 AfriNIC Region transit ASes present in the Internet Routing Table: 10 Average AfriNIC Region AS path length visible: 3.7 Max AfriNIC Region AS path length visible: 8 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 25 Number of AfriNIC addresses announced to Internet: 2595328 Equivalent to 0 /8s, 39 /16s and 154 /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 612 2157 457 SINET-AS Research Organization of Infor 1237 188 74 135 KREONET-AS-KR KISTI, KR 7575 177 330 123 AARNET-AS-AP Australian Academic and Re 58647 165 18 2 KAGAWAU-AS Kagawa University, JP 55824 129 19 23 NKN-CORE-NW NKN Core Network, IN 4538 112 4160 69 ERX-CERNET-BKB China Education and Rese 4621 80 37 10 UNINET-AS-AP UNINET-, TH 4762 65 4 1 MAHIDOL-BORDER-AS Mahidol University, T 23570 59 5 11 INCHEON-AS-KR UNIVERSITY OF INCHEON, KR 1659 55 1466 35 ERX-TANET-ASN1 Taiwan Academic Network Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 7896 251 51 7 NU-AS, US 376 203 178 152 RISQ-AS, CA 5786 200 16 1 UPRENET, PR 2152 145 507 85 CSUNET-NW, US 18558 134 18 4 NETBLK-RCOEK, US 2920 111 34 6 LACOE, US 21976 85 51 18 NJEDGE-NET, US 1736 80 16 1 MU-AS, US 3 77 496 15 MIT-GATEWAYS, US 3477 72 71 42 NOAA-NWAVE, US Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 680 279 1950 245 DFN Verein zur Foerderung eines Deutsch 786 186 1774 183 JANET Jisc Services Limited, GB 8895 143 24 4 ISU Internet Services Unit ISU, SA 559 115 550 106 SWITCH Peering requests: peering@switch 1103 98 1520 85 SURFNET-NL SURFnet, The Netherlands, NL 137 82 677 77 ASGARR Consortium GARR, IT 553 72 449 72 BELWUE BelWue-Koordination, DE 2200 67 647 61 FR-RENATER Reseau National de telecommu 2614 58 33 56 ROEDUNET, RO 1930 57 81 52 RCCN Fundacao para a Ciencia e a Tecnol Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1916 176 207 41 Rede Nacional de Ensino e Pesquisa, BR 28391 152 10 66 Universidad Juarez Autonoma de Tabasco, 11340 94 24 54 Red Universitaria Nacional, CL 1251 65 37 20 FUNDACAO DE AMPARO A PESQUISA DO ESTADO 2715 58 102 38 Fundacao Carlos Chagas Filho de Amparo 52286 54 4 31 Columbus Networks Guatemala, GT 19611 45 17 2 Associacao Antonio Vieira - Unisinos, B 4270 43 16 1 Red de Interconexion Universitaria, AR 61468 41 3 15 CEDIA, EC 28614 38 2 2 Fundacao Universidade Regional de Blume Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 2018 356 319 74 TENET-1, ZA 36914 202 82 3 KENET-AS, KE 2561 72 5 31 EUN, EG 8094 50 48 4 PUKNET, ZA 327700 42 16 1 MoRENet, MZ 327687 37 28 3 RENU, UG 6879 24 2 9 ENSTINET-, EG 37074 13 8 2 UG-AS, GH 37182 13 8 1 TERNET, TZ 37501 11 49 6 UOFS, ZA Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 2907 612 2157 457 SINET-AS Research Organization of Infor 2018 356 319 74 TENET-1, ZA 680 279 1950 245 DFN Verein zur Foerderung eines Deutsch 7896 251 51 7 NU-AS, US 376 203 178 152 RISQ-AS, CA 36914 202 82 3 KENET-AS, KE 5786 200 16 1 UPRENET, PR 1237 188 74 135 KREONET-AS-KR KISTI, KR 786 186 1774 183 JANET Jisc Services Limited, GB 7575 177 330 123 AARNET-AS-AP Australian Academic and Re Complete listing at https://bgp.nsrc.org/REN/CERNET/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 2018 356 282 TENET-1, ZA 7896 251 244 NU-AS, US 36914 202 199 KENET-AS, KE 5786 200 199 UPRENET, PR 58647 165 163 KAGAWAU-AS Kagawa University, JP 8895 143 139 ISU Internet Services Unit ISU, SA 1916 176 135 Rede Nacional de Ensino e Pesquisa, BR 18558 134 130 NETBLK-RCOEK, US 55824 129 106 NKN-CORE-NW NKN Core Network, IN 2920 111 105 LACOE, US Complete listing at https://bgp.nsrc.org/REN/CERNET/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 22063 UNALLOCATED 153.10.0.0/16 2152 CSUNET-NW, US 19658 UNALLOCATED 199.27.241.0/24 11096 FLORIDANET, US Complete listing at https://bgp.nsrc.org/REN/CERNET/data-badAS Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 192.31.196.0/24 Origin: 112 UNASSIGNED 192.31.196.0/24 Transit: 1103 SURFNET-NL SURFnet, The Netherlands, NL 192.88.99.0/24 Origin: 1103 SURFNET-NL SURFnet, The Netherlands, NL 192.88.99.0/24 Transit: 20965 GEANT The GEANT IP Service, NL Complete listing at https://bgp.nsrc.org/REN/CERNET/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 /10:2 /11:1 /12:10 /13:17 /14:31 /15:118 /16:1923 /17:377 /18:424 /19:529 /20:799 /21:823 /22:1353 /23:1395 /24:9366 /25:28 /26:22 /27:28 /28:1 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 36914 188 202 KENET-AS, KE 8895 138 143 ISU Internet Services Unit ISU, SA 23024 53 56 OCDE, US 327700 36 42 MoRENet, MZ 28614 32 38 Fundacao Universidade Regional de Blumenau, BR 25977 31 45 HCCS, US 263282 30 37 FUNDACAO UNIVERSIDADE DO OESTE DE SANTA CATARIN 27609 29 45 USC-UNIVERSITY-HOSPITAL, US 32440 29 44 LONI, US 40326 29 33 ECKERD-COLLEGE, US Complete listing at https://bgp.nsrc.org/REN/CERNET/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:3 5:15 8:2 12:1 14:84 18:42 23:9 24:3 31:6 37:6 38:9 40:1 41:123 44:5 45:47 46:6 47:1 49:10 50:1 52:1 59:19 61:3 62:7 63:34 64:46 66:36 67:43 68:8 69:20 71:1 72:10 74:20 76:33 77:7 78:3 79:10 80:17 81:27 82:5 83:7 84:9 85:33 86:4 87:1 88:1 89:10 91:47 92:1 93:19 94:4 95:5 96:5 97:1 98:2 101:4 102:13 103:296 104:12 108:8 109:9 110:3 111:16 112:4 114:23 116:5 117:61 118:32 119:3 121:17 122:8 123:8 125:1 128:85 129:174 130:93 131:81 132:58 133:139 134:95 136:192 137:80 138:8 139:5 140:36 141:2 142:41 143:35 144:52 145:2 146:126 147:57 148:159 149:13 150:40 151:6 152:75 153:11 154:26 155:51 156:67 157:26 158:39 159:19 160:25 161:16 162:19 163:62 164:46 165:51 166:1 167:16 168:162 169:10 170:53 171:1 172:2 173:2 175:28 176:8 177:10 178:1 179:11 180:20 181:12 182:6 184:6 185:38 186:3 187:18 188:13 189:3 190:50 191:37 192:1254 193:251 194:139 195:93 196:149 197:114 198:429 199:237 200:256 201:39 202:565 203:400 204:314 205:167 206:178 207:166 208:55 209:109 210:110 211:13 212:173 213:4 216:86 217:14 218:6 219:7 220:17 222:2 End of report