[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Sun May 11 22:35:51 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Sun 11 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: 32403
Prefixes after maximum aggregation (per Origin AS): 15971
Deaggregation factor: 2.03
Unique aggregates announced (without unneeded subnets): 18790
Total ASes present in the Internet Routing Table: 2875
Prefixes per ASN: 11.27
Origin-only ASes present in the Internet Routing Table: 2502
Origin ASes announcing only one prefix: 1099
Transit ASes present in the Internet Routing Table: 373
Transit-only ASes present in the Internet Routing Table: 56
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: 46393
Number of 32-bit ASNs visible in the Routing Table: 732
Prefixes from 32-bit ASNs in the Routing Table: 5263
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: 347459328
Equivalent to 20 /8s, 181 /16s and 207 /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: 4281
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4871
Total APNIC prefixes after maximum aggregation: 2342
APNIC Deaggregation factor: 2.08
Prefixes being announced from the APNIC address blocks: 5118
Unique aggregates announced from the APNIC address blocks: 2941
APNIC Region origin ASes present in the Internet Routing Table: 610
APNIC Prefixes per ASN: 8.39
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: 249
Number of APNIC addresses announced to Internet: 47378176
Equivalent to 2 /8s, 210 /16s and 239 /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: 21347
Total ARIN prefixes after maximum aggregation: 9991
ARIN Deaggregation factor: 2.14
Prefixes being announced from the ARIN address blocks: 20509
Unique aggregates announced from the ARIN address blocks: 11252
ARIN Region origin ASes present in the Internet Routing Table: 1358
ARIN Prefixes per ASN: 15.10
ARIN Region origin ASes announcing only one prefix: 475
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: 239
Number of ARIN addresses announced to Internet: 211260416
Equivalent to 12 /8s, 151 /16s and 148 /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: 3719
Total RIPE prefixes after maximum aggregation: 2961
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 4324
Unique aggregates announced from the RIPE address blocks: 3668
RIPE Region origin ASes present in the Internet Routing Table: 661
RIPE Prefixes per ASN: 6.54
RIPE Region origin ASes announcing only one prefix: 287
RIPE Region transit ASes present in the Internet Routing Table: 106
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: 153
Number of RIPE addresses announced to Internet: 81536768
Equivalent to 4 /8s, 220 /16s and 39 /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: 1286
Total LACNIC prefixes after maximum aggregation: 490
LACNIC Deaggregation factor: 2.62
Prefixes being announced from the LACNIC address blocks: 1293
Unique aggregates announced from the LACNIC address blocks: 683
LACNIC Region origin ASes present in the Internet Routing Table: 131
LACNIC Prefixes per ASN: 9.87
LACNIC Region origin ASes announcing only one prefix: 54
LACNIC Region transit ASes present in the Internet Routing Table: 24
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 10
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 57
Number of LACNIC addresses announced to Internet: 4609792
Equivalent to 0 /8s, 70 /16s and 87 /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: 1144
Total AfriNIC prefixes after maximum aggregation: 179
AfriNIC Deaggregation factor: 6.39
Prefixes being announced from the AfriNIC address blocks: 1151
Unique aggregates announced from the AfriNIC address blocks: 238
AfriNIC Region origin ASes present in the Internet Routing Table: 56
AfriNIC Prefixes per ASN: 20.55
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: 4.9
Max AfriNIC Region AS path length visible: 21
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 34
Number of AfriNIC addresses announced to Internet: 2670080
Equivalent to 0 /8s, 40 /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 593 2170 464 SINET-AS Research Organization of Informa
7497 455 180 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 5131 4939 2728 AMAZON-02, US
396982 3146 3851 415 GOOGLE-CLOUD-PLATFORM, US
714 1186 4392 5 APPLE-ENGINEERING, US
14618 1053 4452 810 AMAZON-AES, US
15169 779 190 49 GOOGLE, US
8075 758 16020 638 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 543 507 99 CENIC-2152, US
2920 222 44 49 LACOE, US
668 208 631 177 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 1750 186 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
8987 93 244 67 AMAZON EXPANSION, IE
2614 89 26 69 ROEDUNET, RO
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 241 178 41 Rede Nacional de Ensino e Pesquisa, BR
28391 159 10 71 Universidad Juarez Autonoma de Tabasco, M
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
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 537 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
327700 11 16 1 MoRENet, MZ
37654 10 1 6 RwEdNet-AS, RW
37661 9 6 3 NRaE1-AS, NG
36982 8 33 8 UCT, ZA
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 5131 4939 2728 AMAZON-02, US
396982 3146 3851 415 GOOGLE-CLOUD-PLATFORM, US
714 1186 4392 5 APPLE-ENGINEERING, US
14618 1053 4452 810 AMAZON-AES, US
15169 779 190 49 GOOGLE, US
8075 758 16020 638 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 593 2170 464 SINET-AS Research Organization of Informa
2152 543 507 99 CENIC-2152, US
36914 537 82 3 KENET-AS, KE
7497 455 180 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 3146 2731 GOOGLE-CLOUD-PLATFORM, US
714 1186 1181 APPLE-ENGINEERING, US
15169 779 730 GOOGLE, US
36914 537 534 KENET-AS, KE
2152 543 444 CENIC-2152, US
7497 455 431 CSTNET-AS-AP Computer Network Information Cente
2018 373 304 TENET-1, ZA
14618 1053 243 AMAZON-AES, US
1916 241 200 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
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
198.135.168.0/24 Origin: 14618 AMAZON-AES, US
198.135.168.0/24 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 /16:2428 /17:623 /18:614
/19:891 /20:3055 /21:1508 /22:2230 /23:2514 /24:18072
/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 826 5131 AMAZON-02, US
36914 513 537 KENET-AS, KE
14618 337 1053 AMAZON-AES, US
396982 281 3146 GOOGLE-CLOUD-PLATFORM, US
15169 275 779 GOOGLE, US
8075 141 758 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 106 109 ISU Internet Services Unit ISU, SA
2152 63 543 CENIC-2152, US
23024 38 99 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 3:317 4:2 5:27 6:4
8:12 12:2 13:166 14:93 15:138 16:132
17:319 18:327 20:15 23:133 24:3 31:6
34:24 35:102 36:1 37:11 38:12 40:6
41:216 42:18 43:2 44:5 45:91 46:13
47:1 49:8 50:13 52:848 54:182 57:12
58:16 59:20 60:6 61:3 62:16 63:46
64:182 65:45 66:126 67:80 68:25 69:75
70:30 71:25 72:22 74:164 75:1 76:43
77:11 78:3 79:11 80:14 81:25 82:8
83:9 84:9 85:58 86:6 87:6 88:1
89:24 91:60 92:9 93:46 94:8 95:2
96:7 97:2 98:15 99:75 101:3 102:16
103:433 104:277 107:42 108:172 109:10 111:22
113:5 114:32 116:14 117:68 118:34 119:31
121:29 122:11 123:8 124:42 125:5 128:60
129:48 130:170 131:82 132:68 133:156 134:116
135:10 136:315 137:125 138:23 139:27 140:47
141:18 142:334 143:41 144:69 145:9 146:142
147:50 148:213 149:19 150:47 151:54 152:153
153:15 154:47 155:133 156:133 157:40 158:41
159:171 160:40 161:52 162:115 163:79 164:31
165:79 166:5 167:57 168:170 169:14 170:146
171:1 172:139 173:130 174:2 175:16 176:6
177:5 178:3 179:13 180:16 181:1 182:12
184:9 185:157 186:3 187:25 188:20 189:3
190:17 191:12 192:1748 193:338 194:143 195:90
196:148 197:328 198:640 199:415 200:304 201:39
202:657 203:470 204:468 205:221 206:265 207:363
208:178 209:282 210:211 211:4 212:160 213:23
214:10 216:265 217:28 218:23 219:7 220:16
222:4 223:16
End of report
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