IPv4 R&E Routing Table Report 22:05 GMT Mon 11 Sep, 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: 24461 Prefixes after maximum aggregation (per Origin AS): 13698 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 16215 Number of IPv4 prefixes with a valid ROA: 10722 Number of IPv4 prefixes with an invalid ROA: 13 Number of IPv4 prefixes with no ROA: 13726 Total ASes present in the Internet Routing Table: 2786 Prefixes per ASN: 8.78 Origin-only ASes present in the Internet Routing Table: 2402 Origin ASes announcing only one prefix: 1064 Transit ASes present in the Internet Routing Table: 384 Transit-only ASes present in the Internet Routing Table: 71 Paths with bogon ASNs present in the IPv4 Routing Table: 2 Average AS path length visible in the Internet Routing Table: 3.9 Max AS path length visible: 15 Max AS path prepend of ASN (395156) 12 Prefixes from unregistered ASNs in the Routing Table: 3 Number of instances of unregistered ASNs: 3 Number of 32-bit ASNs allocated by the RIRs: 42592 Number of 32-bit ASNs visible in the Routing Table: 637 Prefixes from 32-bit ASNs in the Routing Table: 1934 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: 17 Number of addresses announced to Internet: 296428800 Equivalent to 17 /8s, 171 /16s and 37 /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: 99.5 Total number of prefixes smaller than registry allocations: 3129 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4649 Total APNIC prefixes after maximum aggregation: 2293 APNIC Deaggregation factor: 2.03 Prefixes being announced from the APNIC address blocks: 4764 Unique aggregates announced from the APNIC address blocks: 2734 APNIC Region origin ASes present in the Internet Routing Table: 544 APNIC Prefixes per ASN: 8.76 APNIC Region origin ASes announcing only one prefix: 229 APNIC Region transit ASes present in the Internet Routing Table: 58 Average APNIC Region AS path length visible: 4.2 Max APNIC Region AS path length visible: 14 Number of APNIC region 32-bit ASNs visible in the Routing Table: 205 Number of APNIC addresses announced to Internet: 47178496 Equivalent to 2 /8s, 207 /16s and 227 /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, 131072-153913 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: 13708 Total ARIN prefixes after maximum aggregation: 7795 ARIN Deaggregation factor: 1.76 Prefixes being announced from the ARIN address blocks: 13345 Unique aggregates announced from the ARIN address blocks: 9273 ARIN Region origin ASes present in the Internet Routing Table: 1274 ARIN Prefixes per ASN: 10.47 ARIN Region origin ASes announcing only one prefix: 445 ARIN Region transit ASes present in the Internet Routing Table: 167 Average ARIN Region AS path length visible: 3.5 Max ARIN Region AS path length visible: 15 Number of ARIN region 32-bit ASNs visible in the Routing Table: 197 Number of ARIN addresses announced to Internet: 174246400 Equivalent to 10 /8s, 98 /16s and 202 /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: 3591 Total RIPE prefixes after maximum aggregation: 2862 RIPE Deaggregation factor: 1.25 Prefixes being announced from the RIPE address blocks: 3822 Unique aggregates announced from the RIPE address blocks: 3184 RIPE Region origin ASes present in the Internet Routing Table: 680 RIPE Prefixes per ASN: 5.62 RIPE Region origin ASes announcing only one prefix: 300 RIPE Region transit ASes present in the Internet Routing Table: 106 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: 67386368 Equivalent to 4 /8s, 4 /16s and 60 /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, 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: 1460 Total LACNIC prefixes after maximum aggregation: 572 LACNIC Deaggregation factor: 2.55 Prefixes being announced from the LACNIC address blocks: 1461 Unique aggregates announced from the LACNIC address blocks: 786 LACNIC Region origin ASes present in the Internet Routing Table: 166 LACNIC Prefixes per ASN: 8.80 LACNIC Region origin ASes announcing only one prefix: 65 LACNIC Region transit ASes present in the Internet Routing Table: 25 Average LACNIC Region AS path length visible: 5.0 Max LACNIC Region AS path length visible: 13 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 68 Number of LACNIC addresses announced to Internet: 4752640 Equivalent to 0 /8s, 72 /16s and 133 /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: 1050 Total AfriNIC prefixes after maximum aggregation: 173 AfriNIC Deaggregation factor: 6.07 Prefixes being announced from the AfriNIC address blocks: 1052 Unique aggregates announced from the AfriNIC address blocks: 221 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 21.47 AfriNIC Region origin ASes announcing only one prefix: 25 AfriNIC Region transit ASes present in the Internet Routing Table: 9 Average AfriNIC Region AS path length visible: 3.8 Max AfriNIC Region AS path length visible: 10 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 26 Number of AfriNIC addresses announced to Internet: 2790656 Equivalent to 0 /8s, 42 /16s and 149 /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 593 2163 465 SINET-AS Research Organization of Infor 7497 434 180 23 CSTNET-AS-AP Computer Network Informati 1237 191 74 139 KREONET-AS-KR KISTI, KR 7575 177 329 120 AARNET-AS-AP Australian Academic and Re 58647 177 18 2 KAGAWAU-AS Kagawa University, JP 4538 130 4192 73 ERX-CERNET-BKB China Education and Rese 55824 126 18 17 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 63 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 4364 4606 1984 AMAZON-02, US 14618 814 4019 612 AMAZON-AES, US 8075 378 12791 319 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 203 651 172 DNIC-AS-00668, US 376 201 178 150 RISQ-AS, CA 5786 197 16 1 UPRENET, PR 2152 145 507 92 CSUNET-NW, US 18558 136 18 4 NETBLK-RCOEK, US 81 127 521 30 NCREN, US 270 118 329 82 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 1903 249 DFN Verein zur Foerderung eines Deutsch 786 185 1767 182 JANET Jisc Services Limited, GB 8895 136 24 5 ISU Internet Services Unit ISU, SA 559 113 533 105 SWITCH Peering requests: peering@switch 1103 94 1502 83 SURFNET-NL SURFnet, The Netherlands, NL 2614 94 27 74 ROEDUNET, RO 137 82 677 77 ASGARR Consortium GARR, IT 553 74 465 74 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 221 176 42 Rede Nacional de Ensino e Pesquisa, BR 28391 153 10 67 Universidad Juarez Autonoma de Tabasco, 11340 104 24 48 Red Universitaria Nacional, CL 271640 72 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR 2715 59 102 39 Fundacao Carlos Chagas Filho de Amparo 4270 48 16 1 Red de Interconexion Universitaria, AR 19611 48 17 2 Associacao Antonio Vieira - Unisinos, B 61468 43 3 14 CEDIA, EC 28614 38 2 2 Fundacao Universidade Regional de Blume 3596 34 4 3 Universidad Autonoma Metropolitana, MX 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 71 TENET-1, ZA 36914 253 82 3 KENET-AS, KE 327687 166 28 3 RENU, UG 8094 47 48 18 PUKNET, ZA 327700 42 16 1 MoRENet, MZ 3208 32 2 1 ARN, DZ 6879 24 2 9 ENSTINET-, EG 37074 14 8 2 UG-AS, GH 37501 11 49 6 UOFS, ZA 37654 10 1 6 RwEdNet-AS, RW 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 4364 4606 1984 AMAZON-02, US 14618 814 4019 612 AMAZON-AES, US 2907 593 2163 465 SINET-AS Research Organization of Infor 7497 434 180 23 CSTNET-AS-AP Computer Network Informati 8075 378 12791 319 MICROSOFT-CORP-MSN-AS-BLOCK, US 2018 370 319 71 TENET-1, ZA 680 283 1903 249 DFN Verein zur Foerderung eines Deutsch 36914 253 82 3 KENET-AS, KE 1916 221 176 42 Rede Nacional de Ensino e Pesquisa, BR 668 203 651 172 DNIC-AS-00668, US 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 434 411 CSTNET-AS-AP Computer Network Information Cente 2018 370 299 TENET-1, ZA 36914 253 250 KENET-AS, KE 14618 814 202 AMAZON-AES, US 5786 197 196 UPRENET, PR 1916 221 179 Rede Nacional de Ensino e Pesquisa, BR 58647 177 175 KAGAWAU-AS Kagawa University, JP 327687 166 163 RENU, UG 18558 136 132 NETBLK-RCOEK, US 8895 136 131 ISU Internet Services Unit ISU, SA 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 394607 UNALLOCATED 104.249.65.0/24 23024 OCDE, US 33008 UNALLOCATED 162.248.66.0/24 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 45.42.252.0/22 Origin: 16509 AMAZON-02, US 45.42.252.0/22 Transit: 2152 CSUNET-NW, US 64.186.3.0/24 Origin: 16509 AMAZON-02, US 64.186.3.0/24 Transit: 2152 CSUNET-NW, US 134.208.0.0/16 Origin: 17711 NDHU-TW National Dong Hwa University, TW 134.208.0.0/16 Transit: 7539 TWAREN-TW National Center for High-perfo 144.81.129.0/24 Origin: 14618 AMAZON-AES, US 144.81.129.0/24 Transit: 16509 AMAZON-02, US 144.81.130.0/24 Origin: 14618 AMAZON-AES, US 144.81.130.0/24 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 /14:81 /15:202 /16:2140 /17:494 /18:472 /19:616 /20:1016 /21:1181 /22:1915 /23:1991 /24:14274 /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 708 4364 AMAZON-02, US 14618 266 814 AMAZON-AES, US 36914 242 253 KENET-AS, KE 8895 131 136 ISU Internet Services Unit ISU, SA 8075 72 378 MICROSOFT-CORP-MSN-AS-BLOCK, US 23024 52 113 OCDE, US 32440 37 59 LONI, US 327700 36 42 MoRENet, MZ 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) ---------------------------------------------- 1:3 2:1 3:123 4:2 5:20 6:4 8:2 12:1 13:180 14:89 15:129 16:109 18:245 23:47 24:3 31:7 34:2 35:14 38:9 40:1 41:116 42:10 44:8 45:67 46:11 47:1 49:9 50:12 52:879 54:266 58:2 59:19 60:4 61:3 62:18 63:42 64:150 65:32 66:92 67:65 68:20 69:52 70:26 71:46 72:18 74:73 76:48 77:11 78:3 79:10 80:12 81:27 82:6 83:6 84:8 85:44 86:10 87:2 88:1 89:13 91:57 92:4 93:4 94:8 95:2 96:6 97:2 98:13 99:78 101:2 102:29 103:309 104:114 107:1 108:84 109:11 111:17 113:4 114:23 115:1 116:10 117:61 118:32 119:18 121:27 122:11 123:8 124:39 125:4 128:87 129:52 130:155 131:76 132:57 133:152 134:107 135:3 136:212 137:149 138:15 139:18 140:43 141:5 142:60 143:35 144:66 145:5 146:132 147:67 148:203 149:17 150:51 151:24 152:151 153:14 154:27 155:81 156:71 157:30 158:40 159:157 160:35 161:46 162:69 163:94 164:22 165:56 166:2 167:25 168:166 169:12 170:168 171:1 172:12 173:26 174:2 175:26 176:13 177:5 178:2 179:13 180:15 181:1 182:1 184:8 185:104 186:3 187:17 188:15 189:3 190:19 191:13 192:1544 193:309 194:134 195:86 196:202 197:166 198:545 199:343 200:340 201:38 202:648 203:442 204:396 205:168 206:216 207:202 208:121 209:153 210:190 211:14 212:174 213:17 214:8 216:180 217:11 218:22 219:5 220:16 222:2 223:14 End of report