[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Tue May 27 22:35:41 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Tue 27 May, 2025
IPv4 BGP Table (R&E) as seen at RouteViews PacWave.
Report Website: https://bgp.nsrc.org/REN
Detailed Analysis: https://bgp.nsrc.org/REN/PacWave/
Analysis Summary
----------------
BGP routing table entries examined: 32391
Prefixes after maximum aggregation (per Origin AS): 16152
Deaggregation factor: 2.01
Unique aggregates announced (without unneeded subnets): 18755
Total ASes present in the Internet Routing Table: 2877
Prefixes per ASN: 11.26
Origin-only ASes present in the Internet Routing Table: 2507
Origin ASes announcing only one prefix: 1102
Transit ASes present in the Internet Routing Table: 370
Transit-only ASes present in the Internet Routing Table: 53
Paths with bogon ASNs present in the IPv4 Routing Table: 0
Average AS path length visible in the Internet Routing Table: 3.5
Max AS path length visible: 21
Max AS path prepend of ASN (395156) 12
Prefixes from unregistered ASNs in the Routing Table: 36
Number of instances of unregistered ASNs: 36
Number of 32-bit ASNs allocated by the RIRs: 46522
Number of 32-bit ASNs visible in the Routing Table: 737
Prefixes from 32-bit ASNs in the Routing Table: 5287
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: 9
Number of addresses announced to Internet: 347311872
Equivalent to 20 /8s, 179 /16s and 143 /24s
Percentage of available address space announced: 9.4
Percentage of allocated address space announced: 9.4
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: 4303
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4860
Total APNIC prefixes after maximum aggregation: 2339
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 5112
Unique aggregates announced from the APNIC address blocks: 2939
APNIC Region origin ASes present in the Internet Routing Table: 611
APNIC Prefixes per ASN: 8.37
APNIC Region origin ASes announcing only one prefix: 253
APNIC Region transit ASes present in the Internet Routing Table: 53
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 14
Number of APNIC region 32-bit ASNs visible in the Routing Table: 250
Number of APNIC addresses announced to Internet: 47375104
Equivalent to 2 /8s, 210 /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, 131072-155961
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: 21512
Total ARIN prefixes after maximum aggregation: 10250
ARIN Deaggregation factor: 2.10
Prefixes being announced from the ARIN address blocks: 20670
Unique aggregates announced from the ARIN address blocks: 11379
ARIN Region origin ASes present in the Internet Routing Table: 1363
ARIN Prefixes per ASN: 15.17
ARIN Region origin ASes announcing only one prefix: 474
ARIN Region transit ASes present in the Internet Routing Table: 166
Average ARIN Region AS path length visible: 2.9
Max ARIN Region AS path length visible: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 241
Number of ARIN addresses announced to Internet: 211350528
Equivalent to 12 /8s, 152 /16s and 244 /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: 3712
Total RIPE prefixes after maximum aggregation: 2960
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 4315
Unique aggregates announced from the RIPE address blocks: 3667
RIPE Region origin ASes present in the Internet Routing Table: 662
RIPE Prefixes per ASN: 6.52
RIPE Region origin ASes announcing only one prefix: 289
RIPE Region transit ASes present in the Internet Routing Table: 105
Average RIPE Region AS path length visible: 4.7
Max RIPE Region AS path length visible: 15
Number of RIPE region 32-bit ASNs visible in the Routing Table: 154
Number of RIPE addresses announced to Internet: 81468928
Equivalent to 4 /8s, 219 /16s and 30 /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: 1123
Total LACNIC prefixes after maximum aggregation: 417
LACNIC Deaggregation factor: 2.69
Prefixes being announced from the LACNIC address blocks: 1130
Unique aggregates announced from the LACNIC address blocks: 524
LACNIC Region origin ASes present in the Internet Routing Table: 130
LACNIC Prefixes per ASN: 8.69
LACNIC Region origin ASes announcing only one prefix: 56
LACNIC Region transit ASes present in the Internet Routing Table: 23
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 10
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 59
Number of LACNIC addresses announced to Internet: 4508416
Equivalent to 0 /8s, 68 /16s and 203 /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: 1148
Total AfriNIC prefixes after maximum aggregation: 178
AfriNIC Deaggregation factor: 6.45
Prefixes being announced from the AfriNIC address blocks: 1155
Unique aggregates announced from the AfriNIC address blocks: 237
AfriNIC Region origin ASes present in the Internet Routing Table: 55
AfriNIC Prefixes per ASN: 21.00
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: 21
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 33
Number of AfriNIC addresses announced to Internet: 2604544
Equivalent to 0 /8s, 39 /16s and 190 /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 594 2170 463 SINET-AS Research Organization of Informa
7497 456 180 24 CSTNET-AS-AP Computer Network Information
1237 194 74 146 KREONET-AS-KR KISTI, KR
4538 193 4192 72 ERX-CERNET-BKB China Education and Resear
58647 182 18 2 KAGAWAU-AS Kagawa University, JP
7575 174 282 117 AARNET-AS-AP Australian Academic and Rese
55824 147 19 21 NKN-CORE-NW NKN Core Network, IN
4762 75 4 1 MAHIDOL-BORDER-AS Mahidol University, Tha
4621 67 37 9 UNINET-AS-AP UNINET-, TH
1659 61 1466 35 ERX-TANET-ASN1 Taiwan Academic Network TA
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 5173 4933 2938 AMAZON-02, US
396982 3169 3852 417 GOOGLE-CLOUD-PLATFORM, US
714 1192 4392 5 APPLE-ENGINEERING, US
14618 1057 4453 812 AMAZON-AES, US
15169 786 187 46 GOOGLE, US
8075 764 16021 643 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 550 507 99 CENIC-2152, US
2920 229 44 49 LACOE, US
668 209 647 178 DNIC-AS-00668, US
376 202 162 151 RISQ-AS, CA
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
680 284 1899 250 DFN Verein zur Foerderung eines Deutschen
786 194 1742 187 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 109 24 5 ISU Internet Services Unit ISU, SA
1103 97 1727 83 SURFNET-NL SURFnet, The Netherlands, NL
2614 92 26 69 ROEDUNET, RO
8987 91 244 66 AMAZON EXPANSION, IE
137 82 677 77 ASGARR Consortium GARR, IT
1930 79 88 74 RCCN Fundacao para a Ciencia e a Tecnolog
3267 79 29 69 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
1916 242 178 41 Rede Nacional de Ensino e Pesquisa, BR
11340 110 25 52 Red Universitaria Nacional, CL
271640 68 8 1 UNIVERSIDADE FEDERAL DE VICOSA, BR
2715 52 100 36 Fundacao Carlos Chagas Filho de Amparo a
61468 52 3 21 CEDIA, EC
19611 48 17 2 Associacao Antonio Vieira - Unisinos, BR
28614 38 2 2 Fundacao Universidade Regional de Blumena
1251 37 31 26 FUNDACAO DE AMPARO A PESQUISA DO ESTADO S
3596 37 8 4 Universidad Autonoma Metropolitana, MX
21612 27 16 1 FUNDACAO INSTITUTO OSWALDO CRUZ, BR
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
36914 551 82 3 KENET-AS, KE
2018 373 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 36 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37501 11 49 6 UOFS, ZA
37654 10 1 6 RwEdNet-AS, RW
37661 9 6 3 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
327947 8 4 1 KNUST-, GH
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
16509 5173 4933 2938 AMAZON-02, US
396982 3169 3852 417 GOOGLE-CLOUD-PLATFORM, US
714 1192 4392 5 APPLE-ENGINEERING, US
14618 1057 4453 812 AMAZON-AES, US
15169 786 187 46 GOOGLE, US
8075 764 16021 643 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 594 2170 463 SINET-AS Research Organization of Informa
36914 551 82 3 KENET-AS, KE
2152 550 507 99 CENIC-2152, US
7497 456 180 24 CSTNET-AS-AP Computer Network Information
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-ASnet
Global Per AS Maximum Aggregation summary
-----------------------------------------
ASN No of nets Net Savings Description
396982 3169 2752 GOOGLE-CLOUD-PLATFORM, US
714 1192 1187 APPLE-ENGINEERING, US
15169 786 740 GOOGLE, US
36914 551 548 KENET-AS, KE
2152 550 451 CENIC-2152, US
7497 456 432 CSTNET-AS-AP Computer Network Information Cente
2018 373 304 TENET-1, ZA
14618 1057 245 AMAZON-AES, US
1916 242 201 Rede Nacional de Ensino e Pesquisa, BR
5786 199 198 UPRENET, PR
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Net Originated Transit AS Transit AS Name
65208 PRIVATE 63.225.1.0/24 11570 AS11570, US
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
26898 UNALLOCATED 131.187.248.0/22 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.248.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.249.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.250.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 131.187.251.0/24 3112 OARNET-AS-1, US
26898 UNALLOCATED 198.30.187.0/24 3112 OARNET-AS-1, US
65208 PRIVATE 206.206.156.0/22 11570 AS11570, US
26898 UNALLOCATED 208.108.80.0/20 3112 OARNET-AS-1, US
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
64.190.237.0/24 Origin: 16509 AMAZON-02, US
64.190.237.0/24 Transit: 101 WASH-NSF-AS, US
103.177.50.0/23 Origin: 396982 GOOGLE-CLOUD-PLATFORM, US
103.177.50.0/23 Transit: 15169 GOOGLE, US
164.160.192.0/21 Origin: 37661 NRaE1-AS, NG
164.160.192.0/21 Transit: 37288 WACREN, SN
192.225.212.0/24 Origin: 14618 AMAZON-AES, US
192.225.212.0/24 Transit: 16509 AMAZON-02, US
192.225.223.0/24 Origin: 14618 AMAZON-AES, US
192.225.223.0/24 Transit: 16509 AMAZON-02, US
Complete listing at https://bgp.nsrc.org/REN/PacWave/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 /8:1 /9:3 /10:3 /11:11 /12:38
/13:53 /14:121 /15:237 /16:2425 /17:624 /18:617
/19:891 /20:3057 /21:1500 /22:2229 /23:2531 /24:18049
/25:0 /26:0 /27:0 /28:1 /29:0 /30:0
/31:0 /32:0
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
16509 833 5173 AMAZON-02, US
36914 527 551 KENET-AS, KE
14618 336 1057 AMAZON-AES, US
396982 281 3169 GOOGLE-CLOUD-PLATFORM, US
15169 273 786 GOOGLE, US
8075 141 764 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 106 109 ISU Internet Services Unit ISU, SA
2152 65 550 CENIC-2152, US
23024 38 98 OCDE, US
3267 35 79 NIKS, RU
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
1:3 2:2 3:351 4:2 5:26 6:4
8:28 12:2 13:183 14:93 15:139 16:132
17:323 18:325 20:17 23:131 24:3 31:6
34:24 35:104 36:1 37:11 38:12 40:6
41:212 42:18 43:2 44:5 45:87 46:14
47:1 49:12 50:13 52:848 54:185 57:12
58:16 59:20 60:6 61:3 62:16 63:46
64:182 65:47 66:127 67:79 68:27 69:74
70:31 71:26 72:22 74:165 75:1 76:43
77:11 78:3 79:11 80:14 81:25 82:7
83:9 84:8 85:58 86:7 87:6 88:1
89:24 91:60 92:9 93:47 94:8 95:2
96:7 97:2 98:15 99:80 101:3 102:16
103:434 104:278 107:42 108:170 109:9 111:22
113:6 114:32 116:14 117:68 118:35 119:31
121:29 122:11 123:8 124:42 125:5 128:59
129:48 130:169 131:86 132:67 133:156 134:116
135:10 136:317 137:127 138:23 139:21 140:47
141:18 142:335 143:44 144:68 145:9 146:141
147:75 148:54 149:19 150:45 151:54 152:154
153:15 154:47 155:133 156:133 157:45 158:42
159:177 160:40 161:53 162:115 163:79 164:29
165:80 166:5 167:57 168:170 169:15 170:146
171:1 172:144 173:131 174:2 175:16 176:6
177:5 178:3 179:13 180:16 181:1 182:12
184:10 185:157 186:3 187:25 188:21 189:3
190:17 191:13 192:1750 193:336 194:146 195:90
196:148 197:336 198:648 199:416 200:304 201:39
202:658 203:465 204:464 205:219 206:260 207:362
208:179 209:284 210:211 211:4 212:161 213:23
214:10 216:263 217:28 218:23 219:7 220:16
222:4 223:16
End of report
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