[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Fri Apr 25 22:35:50 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Fri 25 Apr, 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: 32514
Prefixes after maximum aggregation (per Origin AS): 15793
Deaggregation factor: 2.06
Unique aggregates announced (without unneeded subnets): 18834
Total ASes present in the Internet Routing Table: 2895
Prefixes per ASN: 11.23
Origin-only ASes present in the Internet Routing Table: 2516
Origin ASes announcing only one prefix: 1104
Transit ASes present in the Internet Routing Table: 379
Transit-only ASes present in the Internet Routing Table: 63
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: 37
Number of instances of unregistered ASNs: 37
Number of 32-bit ASNs allocated by the RIRs: 46264
Number of 32-bit ASNs visible in the Routing Table: 738
Prefixes from 32-bit ASNs in the Routing Table: 5079
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: 347752192
Equivalent to 20 /8s, 186 /16s and 71 /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: 4294
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4923
Total APNIC prefixes after maximum aggregation: 2339
APNIC Deaggregation factor: 2.10
Prefixes being announced from the APNIC address blocks: 5158
Unique aggregates announced from the APNIC address blocks: 2924
APNIC Region origin ASes present in the Internet Routing Table: 610
APNIC Prefixes per ASN: 8.46
APNIC Region origin ASes announcing only one prefix: 252
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: 47377664
Equivalent to 2 /8s, 210 /16s and 237 /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: 21401
Total ARIN prefixes after maximum aggregation: 9817
ARIN Deaggregation factor: 2.18
Prefixes being announced from the ARIN address blocks: 20580
Unique aggregates announced from the ARIN address blocks: 11319
ARIN Region origin ASes present in the Internet Routing Table: 1369
ARIN Prefixes per ASN: 15.03
ARIN Region origin ASes announcing only one prefix: 477
ARIN Region transit ASes present in the Internet Routing Table: 172
Average ARIN Region AS path length visible: 2.9
Max ARIN Region AS path length visible: 17
Number of ARIN region 32-bit ASNs visible in the Routing Table: 244
Number of ARIN addresses announced to Internet: 211554048
Equivalent to 12 /8s, 156 /16s and 15 /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: 3721
Total RIPE prefixes after maximum aggregation: 2960
RIPE Deaggregation factor: 1.26
Prefixes being announced from the RIPE address blocks: 4321
Unique aggregates announced from the RIPE address blocks: 3663
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: 288
RIPE Region transit ASes present in the Internet Routing Table: 104
Average RIPE Region AS path length visible: 4.6
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: 81568512
Equivalent to 4 /8s, 220 /16s and 163 /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: 1283
Total LACNIC prefixes after maximum aggregation: 491
LACNIC Deaggregation factor: 2.61
Prefixes being announced from the LACNIC address blocks: 1290
Unique aggregates announced from the LACNIC address blocks: 683
LACNIC Region origin ASes present in the Internet Routing Table: 133
LACNIC Prefixes per ASN: 9.70
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: 4.6
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: 4610560
Equivalent to 0 /8s, 70 /16s and 90 /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: 1149
Total AfriNIC prefixes after maximum aggregation: 177
AfriNIC Deaggregation factor: 6.49
Prefixes being announced from the AfriNIC address blocks: 1156
Unique aggregates announced from the AfriNIC address blocks: 236
AfriNIC Region origin ASes present in the Internet Routing Table: 55
AfriNIC Prefixes per ASN: 21.02
AfriNIC Region origin ASes announcing only one prefix: 31
AfriNIC Region transit ASes present in the Internet Routing Table: 10
Average AfriNIC Region AS path length visible: 4.7
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: 2637056
Equivalent to 0 /8s, 40 /16s and 61 /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 624 2170 464 SINET-AS Research Organization of Informa
7497 454 180 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 146 19 20 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 5134 4955 2428 AMAZON-02, US
396982 2966 3651 474 GOOGLE-CLOUD-PLATFORM, US
714 1176 4392 5 APPLE-ENGINEERING, US
14618 1042 4451 802 AMAZON-AES, US
15169 969 2012 76 GOOGLE, US
8075 757 16020 638 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 543 507 99 CENIC-2152, US
2920 222 44 49 LACOE, US
668 210 647 178 DNIC-AS-00668, US
376 200 162 150 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
680 285 1899 250 DFN Verein zur Foerderung eines Deutschen
786 195 1750 187 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 107 24 5 ISU Internet Services Unit ISU, SA
1103 98 1743 84 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 236 178 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 67 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 547 82 3 KENET-AS, KE
2018 373 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 34 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 5134 4955 2428 AMAZON-02, US
396982 2966 3651 474 GOOGLE-CLOUD-PLATFORM, US
714 1176 4392 5 APPLE-ENGINEERING, US
14618 1042 4451 802 AMAZON-AES, US
15169 969 2012 76 GOOGLE, US
8075 757 16020 638 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 624 2170 464 SINET-AS Research Organization of Informa
36914 547 82 3 KENET-AS, KE
2152 543 507 99 CENIC-2152, US
7497 454 180 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 2966 2492 GOOGLE-CLOUD-PLATFORM, US
714 1176 1171 APPLE-ENGINEERING, US
15169 969 893 GOOGLE, US
36914 547 544 KENET-AS, KE
2152 543 444 CENIC-2152, US
7497 454 430 CSTNET-AS-AP Computer Network Information Cente
2018 373 304 TENET-1, ZA
14618 1042 240 AMAZON-AES, US
5786 199 198 UPRENET, PR
1916 236 195 Rede Nacional de Ensino e Pesquisa, BR
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
36288 UNALLOCATED 64.79.154.0/24 293 ESNET, 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
Complete listing at https://bgp.nsrc.org/REN/PacWave/data-badAS
Advertised Unallocated Addresses
--------------------------------
Unassigned Network ASN Information AS Name
64.186.3.0/24 Origin: 16509 AMAZON-02, US
64.186.3.0/24 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 /16:2431 /17:620 /18:614
/19:893 /20:3060 /21:1552 /22:2280 /23:2505 /24:18091
/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 841 5134 AMAZON-02, US
36914 523 547 KENET-AS, KE
14618 329 1042 AMAZON-AES, US
396982 280 2966 GOOGLE-CLOUD-PLATFORM, US
15169 272 969 GOOGLE, US
8075 141 757 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 104 107 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 3:281 4:2 5:27 6:4
8:28 12:2 13:155 14:93 15:138 16:132
17:314 18:328 20:14 23:133 24:3 31:6
34:24 35:101 36:1 37:11 38:12 40:6
41:222 42:18 43:2 44:4 45:91 46:13
47:1 49:8 50:13 52:850 54:178 57:12
58:16 59:20 60:6 61:3 62:16 63:46
64:183 65:44 66:127 67:79 68:25 69:74
70:31 71:26 72:22 74:164 75:1 76:43
77:12 78:3 79:11 80:14 81:25 82:7
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 99:74 101:4 102:16
103:434 104:271 107:42 108:171 109:10 111:22
113:5 114:32 116:14 117:67 118:34 119:31
121:29 122:11 123:8 124:42 125:5 128:60
129:48 130:172 131:80 132:68 133:156 134:114
135:10 136:314 137:124 138:23 139:27 140:49
141:18 142:334 143:42 144:70 145:9 146:142
147:81 148:212 149:18 150:77 151:54 152:153
153:15 154:45 155:134 156:133 157:40 158:41
159:172 160:40 161:55 162:115 163:78 164:31
165:80 166:5 167:43 168:170 169:14 170:146
171:1 172:137 173:126 174:2 175:16 176:6
177:5 178:3 179:13 180:16 181:1 182:12
184:9 185:156 186:3 187:26 188:20 189:3
190:17 191:13 192:1748 193:338 194:144 195:90
196:148 197:332 198:655 199:412 200:298 201:39
202:665 203:470 204:467 205:219 206:262 207:359
208:178 209:278 210:227 211:4 212:158 213:23
214:10 216:264 217:27 218:23 219:6 220:16
222:4 223:16
End of report
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