[REN-BGP-stats-all] IPv4 R&E Routing Table Report - ESnet (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Mon Feb 17 22:20:42 UTC 2025
IPv4 R&E Routing Table Report 22:20 GMT Mon 17 Feb, 2025
IPv4 BGP Table (R&E) as seen at ESnet.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/ESnet/
Analysis Summary
----------------
BGP routing table entries examined: 19274
Prefixes after maximum aggregation (per Origin AS): 10467
Deaggregation factor: 1.84
Unique aggregates announced (without unneeded subnets): 11664
Number of IPv4 prefixes with a valid ROA: 7556
Number of IPv4 prefixes with an invalid ROA: 2
Number of IPv4 prefixes with no ROA: 11716
Total ASes present in the Internet Routing Table: 2782
Prefixes per ASN: 6.93
Origin-only ASes present in the Internet Routing Table: 2413
Origin ASes announcing only one prefix: 1082
Transit ASes present in the Internet Routing Table: 369
Transit-only ASes present in the Internet Routing Table: 69
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 3.9
Max AS path length visible: 19
Max AS path prepend of ASN (395156) 12
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: 46152
Number of 32-bit ASNs visible in the Routing Table: 679
Prefixes from 32-bit ASNs in the Routing Table: 1849
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: 3
Number of addresses announced to Internet: 168421376
Equivalent to 10 /8s, 9 /16s and 232 /24s
Percentage of available address space announced: 4.5
Percentage of allocated address space announced: 4.5
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: 2309
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4629
Total APNIC prefixes after maximum aggregation: 2233
APNIC Deaggregation factor: 2.07
Prefixes being announced from the APNIC address blocks: 4629
Unique aggregates announced from the APNIC address blocks: 2629
APNIC Region origin ASes present in the Internet Routing Table: 558
APNIC Prefixes per ASN: 8.30
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: 3.6
Max APNIC Region AS path length visible: 12
Number of APNIC region 32-bit ASNs visible in the Routing Table: 207
Number of APNIC addresses announced to Internet: 35540736
Equivalent to 2 /8s, 30 /16s and 79 /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, 131072-155961
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: 8538
Total ARIN prefixes after maximum aggregation: 4698
ARIN Deaggregation factor: 1.82
Prefixes being announced from the ARIN address blocks: 8548
Unique aggregates announced from the ARIN address blocks: 5194
ARIN Region origin ASes present in the Internet Routing Table: 1290
ARIN Prefixes per ASN: 6.63
ARIN Region origin ASes announcing only one prefix: 464
ARIN Region transit ASes present in the Internet Routing Table: 155
Average ARIN Region AS path length visible: 3.8
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 225
Number of ARIN addresses announced to Internet: 73040896
Equivalent to 4 /8s, 90 /16s and 132 /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, 393216-402332
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, 45/8, 47/8, 48/8, 50/8, 52/8,
54/8, 55/8, 56/8, 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: 3544
Total RIPE prefixes after maximum aggregation: 2836
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 3535
Unique aggregates announced from the RIPE address blocks: 2928
RIPE Region origin ASes present in the Internet Routing Table: 662
RIPE Prefixes per ASN: 5.34
RIPE Region origin ASes announcing only one prefix: 298
RIPE Region transit ASes present in the Internet Routing Table: 104
Average RIPE Region AS path length visible: 3.7
Max RIPE Region AS path length visible: 13
Number of RIPE region 32-bit ASNs visible in the Routing Table: 153
Number of RIPE addresses announced to Internet: 53273600
Equivalent to 3 /8s, 44 /16s and 228 /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,
53/8, 57/8, 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: 1456
Total LACNIC prefixes after maximum aggregation: 524
LACNIC Deaggregation factor: 2.78
Prefixes being announced from the LACNIC address blocks: 1455
Unique aggregates announced from the LACNIC address blocks: 687
LACNIC Region origin ASes present in the Internet Routing Table: 149
LACNIC Prefixes per ASN: 9.77
LACNIC Region origin ASes announcing only one prefix: 52
LACNIC Region transit ASes present in the Internet Routing Table: 22
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 13
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 64
Number of LACNIC addresses announced to Internet: 4122624
Equivalent to 0 /8s, 62 /16s and 232 /24s
LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 64099-64197, 262144-274844 + 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: 1105
Total AfriNIC prefixes after maximum aggregation: 174
AfriNIC Deaggregation factor: 6.35
Prefixes being announced from the AfriNIC address blocks: 1104
Unique aggregates announced from the AfriNIC address blocks: 223
AfriNIC Region origin ASes present in the Internet Routing Table: 52
AfriNIC Prefixes per ASN: 21.23
AfriNIC Region origin ASes announcing only one prefix: 30
AfriNIC Region transit ASes present in the Internet Routing Table: 10
Average AfriNIC Region AS path length visible: 5.0
Max AfriNIC Region AS path length visible: 19
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 30
Number of AfriNIC addresses announced to Internet: 2440960
Equivalent to 0 /8s, 37 /16s and 63 /24s
AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers
AfriNIC Address Blocks 41/8, 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 623 2170 464 SINET-AS Research Organization of Informa
7497 451 180 24 CSTNET-AS-AP Computer Network Information
1237 191 74 145 KREONET-AS-KR KISTI, KR
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 168 297 112 AARNET-AS-AP Australian Academic and Rese
55824 147 19 21 NKN-CORE-NW NKN Core Network, IN
4538 122 2384 69 ERX-CERNET-BKB China Education and Resear
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 69 37 10 UNINET-AS-AP UNINET-, TH
2697 59 4 34 ERX-ERNET-AS Education and Research Netwo
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
2152 532 507 99 CENIC-2152, US
2920 226 44 49 LACOE, US
376 202 162 151 RISQ-AS, CA
5786 194 16 1 UPRENET, PR
18558 140 18 5 NETBLK-RCOEK, US
81 128 471 35 NCREN, US
23024 97 7 17 OCDE, US
21976 88 34 14 NJEDGE-NET, US
237 85 542 51 MERIT-AS-14, US
1736 79 16 1 MU-AS, US
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
786 194 1755 184 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 110 24 5 ISU Internet Services Unit ISU, SA
1103 95 1231 82 SURFNET-NL SURFnet, The Netherlands, NL
2614 93 26 73 ROEDUNET, RO
137 82 677 77 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
3267 76 26 66 NIKS, RU
553 75 366 75 BELWUE BelWue-Koordination, DE
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 236 178 42 Rede Nacional de Ensino e Pesquisa, BR
28391 157 10 69 Universidad Juarez Autonoma de Tabasco, M
11340 109 25 52 Red Universitaria Nacional, CL
271640 67 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
4270 53 16 1 Red de Interconexion Universitaria, AR
61468 52 5 17 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
2715 44 99 33 Fundacao Carlos Chagas Filho de Amparo a
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 471 82 3 KENET-AS, KE
2018 380 319 71 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37182 36 8 1 TERNET, TZ
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 12 8 4 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
327700 11 16 1 MoRENet, MZ
36982 8 33 8 UCT, ZA
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
2907 623 2170 464 SINET-AS Research Organization of Informa
2152 532 507 99 CENIC-2152, US
36914 471 82 3 KENET-AS, KE
7497 451 180 24 CSTNET-AS-AP Computer Network Information
2018 380 319 71 TENET-1, ZA
680 284 1899 249 DFN Verein zur Foerderung eines Deutschen
1916 236 178 42 Rede Nacional de Ensino e Pesquisa, BR
2920 226 44 49 LACOE, US
376 202 162 151 RISQ-AS, CA
786 194 1755 184 JANET Jisc Services Limited, GB
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
36914 471 468 KENET-AS, KE
2152 532 433 CENIC-2152, US
7497 451 427 CSTNET-AS-AP Computer Network Information Cente
2018 380 309 TENET-1, ZA
1916 236 194 Rede Nacional de Ensino e Pesquisa, BR
5786 194 193 UPRENET, PR
58647 183 181 KAGAWAU-AS Kagawa University, JP
2920 226 177 LACOE, US
18558 140 135 NETBLK-RCOEK, US
55824 147 126 NKN-CORE-NW NKN Core Network, IN
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
22272 UNALLOCATED 206.208.24.0/21 6325 ILLINOIS-CENTURY, US
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
202.14.117.0/24 Origin: 17827 STOU-AS-TH Sukhothai Thammathirat Open U
202.14.117.0/24 Transit: 4621 UNINET-AS-AP UNINET-, TH
203.9.156.0/24 Origin: 1851 ADELAIDE-UNIVERSITY-AS-AP The University
203.9.156.0/24 Transit: 7575 AARNET-AS-AP Australian Academic and Res
Complete listing at https://bgp.nsrc.org/REN/ESnet/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 /9:0 /10:0 /11:0 /12:0
/13:0 /14:33 /15:114 /16:1930 /17:424 /18:452
/19:576 /20:862 /21:860 /22:1481 /23:1607 /24:10935
/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
36914 458 471 KENET-AS, KE
8895 107 110 ISU Internet Services Unit ISU, SA
2152 62 532 CENIC-2152, US
23024 36 97 OCDE, US
37182 35 36 TERNET, TZ
3267 34 76 NIKS, RU
32440 33 58 LONI, US
28614 32 38 Fundacao Universidade Regional de Blumenau, BR
46115 32 35 LUTHER, US
200521 31 55 SEAP-AGE, ES
Complete listing at https://bgp.nsrc.org/REN/ESnet/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:2 5:15 8:5 12:2 14:93 18:43
23:11 24:3 31:1 35:9 37:8 38:13
40:1 41:194 42:11 44:4 45:50 46:4
47:1 49:12 50:4 52:1 59:19 60:6
61:3 62:7 63:37 64:47 65:19 66:51
67:43 68:18 69:17 70:2 71:1 72:8
74:54 76:36 77:9 78:3 79:10 80:14
81:25 82:7 83:9 84:5 85:51 86:2
87:1 89:10 91:41 92:2 93:14 94:2
95:2 96:5 97:1 98:2 102:12 103:300
104:79 107:2 108:8 109:5 111:21 113:1
114:24 116:7 117:61 118:32 119:30 121:27
122:8 123:8 124:42 125:5 128:58 129:39
130:96 131:62 132:64 133:156 134:102 136:194
137:98 138:58 139:5 140:31 141:3 142:41
143:25 144:29 145:2 146:136 147:55 148:199
149:13 150:69 151:13 152:127 153:14 154:45
155:59 156:131 157:25 158:31 159:117 160:31
161:18 162:31 163:59 164:10 165:50 166:2
167:26 168:119 169:7 170:103 171:1 172:1
173:6 174:1 175:16 177:6 179:8 180:16
181:1 182:11 184:1 185:50 186:3 187:21
188:14 189:3 190:34 191:13 192:1387 193:293
194:117 195:71 196:149 197:334 198:531 199:253
200:327 201:36 202:641 203:430 204:401 205:175
206:212 207:312 208:65 209:171 210:222 211:3
212:146 213:6 216:93 217:9 218:22 219:6
220:16 222:2 223:4
End of report
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