IPv4 R&E Routing Table Report 22:05 GMT Wed 13 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: 24543 Prefixes after maximum aggregation (per Origin AS): 13698 Deaggregation factor: 1.79 Unique aggregates announced (without unneeded subnets): 16255 Number of IPv4 prefixes with a valid ROA: 10788 Number of IPv4 prefixes with an invalid ROA: 13 Number of IPv4 prefixes with no ROA: 13742 Total ASes present in the Internet Routing Table: 2797 Prefixes per ASN: 8.77 Origin-only ASes present in the Internet Routing Table: 2411 Origin ASes announcing only one prefix: 1068 Transit ASes present in the Internet Routing Table: 386 Transit-only ASes present in the Internet Routing Table: 72 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: 42599 Number of 32-bit ASNs visible in the Routing Table: 638 Prefixes from 32-bit ASNs in the Routing Table: 1944 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: 8 Number of addresses announced to Internet: 296403968 Equivalent to 17 /8s, 170 /16s and 196 /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: 3167 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 4660 Total APNIC prefixes after maximum aggregation: 2294 APNIC Deaggregation factor: 2.03 Prefixes being announced from the APNIC address blocks: 4775 Unique aggregates announced from the APNIC address blocks: 2742 APNIC Region origin ASes present in the Internet Routing Table: 545 APNIC Prefixes per ASN: 8.76 APNIC Region origin ASes announcing only one prefix: 228 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: 47181312 Equivalent to 2 /8s, 207 /16s and 238 /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: 13709 Total ARIN prefixes after maximum aggregation: 7790 ARIN Deaggregation factor: 1.76 Prefixes being announced from the ARIN address blocks: 13356 Unique aggregates announced from the ARIN address blocks: 9287 ARIN Region origin ASes present in the Internet Routing Table: 1273 ARIN Prefixes per ASN: 10.49 ARIN Region origin ASes announcing only one prefix: 446 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: 198 Number of ARIN addresses announced to Internet: 174323712 Equivalent to 10 /8s, 99 /16s and 248 /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: 3596 Total RIPE prefixes after maximum aggregation: 2865 RIPE Deaggregation factor: 1.26 Prefixes being announced from the RIPE address blocks: 3826 Unique aggregates announced from the RIPE address blocks: 3210 RIPE Region origin ASes present in the Internet Routing Table: 689 RIPE Prefixes per ASN: 5.55 RIPE Region origin ASes announcing only one prefix: 304 RIPE Region transit ASes present in the Internet Routing Table: 107 Average RIPE Region AS path length visible: 4.7 Max RIPE Region AS path length visible: 13 Number of RIPE region 32-bit ASNs visible in the Routing Table: 142 Number of RIPE addresses announced to Internet: 67278592 Equivalent to 4 /8s, 2 /16s and 151 /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: 1465 Total LACNIC prefixes after maximum aggregation: 574 LACNIC Deaggregation factor: 2.55 Prefixes being announced from the LACNIC address blocks: 1466 Unique aggregates announced from the LACNIC address blocks: 788 LACNIC Region origin ASes present in the Internet Routing Table: 167 LACNIC Prefixes per ASN: 8.78 LACNIC Region origin ASes announcing only one prefix: 65 LACNIC Region transit ASes present in the Internet Routing Table: 26 Average LACNIC Region AS path length visible: 5.1 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: 4761856 Equivalent to 0 /8s, 72 /16s and 169 /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: 1110 Total AfriNIC prefixes after maximum aggregation: 172 AfriNIC Deaggregation factor: 6.45 Prefixes being announced from the AfriNIC address blocks: 1112 Unique aggregates announced from the AfriNIC address blocks: 220 AfriNIC Region origin ASes present in the Internet Routing Table: 49 AfriNIC Prefixes per ASN: 22.69 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: 25 Number of AfriNIC addresses announced to Internet: 2789632 Equivalent to 0 /8s, 42 /16s and 145 /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 435 180 23 CSTNET-AS-AP Computer Network Informati 1237 192 74 141 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 4376 4609 1984 AMAZON-02, US 14618 814 4019 612 AMAZON-AES, US 8075 377 12791 318 MICROSOFT-CORP-MSN-AS-BLOCK, US 668 203 651 172 DNIC-AS-00668, US 376 201 178 150 RISQ-AS, CA 5786 196 16 1 UPRENET, PR 2152 142 507 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 379 319 71 TENET-1, ZA 36914 303 82 3 KENET-AS, KE 327687 167 28 3 RENU, UG 8094 47 48 18 PUKNET, ZA 327700 41 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 4376 4609 1984 AMAZON-02, US 14618 814 4019 612 AMAZON-AES, US 2907 593 2163 465 SINET-AS Research Organization of Infor 7497 435 180 23 CSTNET-AS-AP Computer Network Informati 2018 379 319 71 TENET-1, ZA 8075 377 12791 318 MICROSOFT-CORP-MSN-AS-BLOCK, US 36914 303 82 3 KENET-AS, KE 680 283 1903 249 DFN Verein zur Foerderung eines Deutsch 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 435 412 CSTNET-AS-AP Computer Network Information Cente 2018 379 308 TENET-1, ZA 36914 303 300 KENET-AS, KE 14618 814 202 AMAZON-AES, US 5786 196 195 UPRENET, PR 1916 221 179 Rede Nacional de Ensino e Pesquisa, BR 58647 177 175 KAGAWAU-AS Kagawa University, JP 327687 167 164 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 170.39.88.0/24 Origin: 14618 AMAZON-AES, US 170.39.88.0/24 Transit: 16509 AMAZON-02, US 173.249.168.0/22 Origin: 16509 AMAZON-02, US 173.249.168.0/22 Transit: 2152 CSUNET-NW, 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 /16:2141 /17:493 /18:471 /19:616 /20:1017 /21:1184 /22:1911 /23:1993 /24:14355 /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 4376 AMAZON-02, US 36914 291 303 KENET-AS, KE 14618 266 814 AMAZON-AES, US 8895 131 136 ISU Internet Services Unit ISU, SA 8075 72 377 MICROSOFT-CORP-MSN-AS-BLOCK, US 23024 52 113 OCDE, US 32440 37 59 LONI, US 327700 35 41 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 3:124 4:2 5:20 6:4 8:2 12:1 13:180 14:89 15:129 16:109 18:250 23:47 24:3 31:7 34:2 35:14 38:9 40:1 41:116 42:10 44:8 45:68 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 67:64 68:21 69:52 70:26 71:46 72:18 74:73 76:48 77:11 78:3 79:10 80:12 81:27 82:6 83:5 84:8 85:42 86:10 87:2 88:1 89:13 91:58 92:4 93:4 94:8 95:2 96:6 97:2 98:13 99:78 101:2 102:29 103:311 104:114 107:1 108:83 109:11 111:17 113:4 114:23 115:1 116:10 117:61 118:32 119:18 121:28 122:11 123:8 124:40 125:4 128:87 129:54 130:155 131:76 132:60 133:152 134:107 135:3 136:211 137:149 138:15 139:17 140:43 141:5 142:60 143:35 144:66 145:5 146:132 147:66 148:203 149:17 150:51 151:24 152:151 153:14 154:28 155:81 156:71 157:30 158:43 159:157 160:35 161:46 162:69 163:94 164:22 165:56 166:2 167:25 168:173 169:12 170:168 171:1 172:12 173:26 174:2 175:26 176:13 177:5 178:2 179:13 180:15 181:1 182:1 184:9 185:107 186:3 187:17 188:15 189:3 190:19 191:13 192:1542 193:312 194:138 195:90 196:204 197:214 198:545 199:343 200:340 201:38 202:648 203:442 204:396 205:167 206:216 207:202 208:121 209:150 210:191 211:14 212:174 213:17 214:8 216:180 217:11 218:22 219:5 220:16 222:2 223:14 End of report