[REN-BGP-stats-all] IPv4 R&E Routing Table Report - RouteViews PacWave (R&E) view
REN Routing Table Report
cscora at bgp.nsrc.org
Mon Mar 24 22:35:49 UTC 2025
IPv4 R&E Routing Table Report 22:35 GMT Mon 24 Mar, 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: 32317
Prefixes after maximum aggregation (per Origin AS): 15653
Deaggregation factor: 2.06
Unique aggregates announced (without unneeded subnets): 18685
Total ASes present in the Internet Routing Table: 2873
Prefixes per ASN: 11.25
Origin-only ASes present in the Internet Routing Table: 2495
Origin ASes announcing only one prefix: 1102
Transit ASes present in the Internet Routing Table: 378
Transit-only ASes present in the Internet Routing Table: 61
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: 4
Number of instances of unregistered ASNs: 4
Number of 32-bit ASNs allocated by the RIRs: 46129
Number of 32-bit ASNs visible in the Routing Table: 726
Prefixes from 32-bit ASNs in the Routing Table: 5010
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: 10
Number of addresses announced to Internet: 345427456
Equivalent to 20 /8s, 150 /16s and 206 /24s
Percentage of available address space announced: 9.3
Percentage of allocated address space announced: 9.3
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: 4237
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 4915
Total APNIC prefixes after maximum aggregation: 2334
APNIC Deaggregation factor: 2.11
Prefixes being announced from the APNIC address blocks: 5143
Unique aggregates announced from the APNIC address blocks: 2906
APNIC Region origin ASes present in the Internet Routing Table: 604
APNIC Prefixes per ASN: 8.51
APNIC Region origin ASes announcing only one prefix: 250
APNIC Region transit ASes present in the Internet Routing Table: 53
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 14
Number of APNIC region 32-bit ASNs visible in the Routing Table: 245
Number of APNIC addresses announced to Internet: 47364352
Equivalent to 2 /8s, 210 /16s and 185 /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: 21284
Total ARIN prefixes after maximum aggregation: 9700
ARIN Deaggregation factor: 2.19
Prefixes being announced from the ARIN address blocks: 20464
Unique aggregates announced from the ARIN address blocks: 11226
ARIN Region origin ASes present in the Internet Routing Table: 1359
ARIN Prefixes per ASN: 15.06
ARIN Region origin ASes announcing only one prefix: 474
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: 15
Number of ARIN region 32-bit ASNs visible in the Routing Table: 239
Number of ARIN addresses announced to Internet: 209407488
Equivalent to 12 /8s, 123 /16s and 78 /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: 3701
Total RIPE prefixes after maximum aggregation: 2951
RIPE Deaggregation factor: 1.25
Prefixes being announced from the RIPE address blocks: 4273
Unique aggregates announced from the RIPE address blocks: 3630
RIPE Region origin ASes present in the Internet Routing Table: 660
RIPE Prefixes per ASN: 6.47
RIPE Region origin ASes announcing only one prefix: 290
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: 152
Number of RIPE addresses announced to Internet: 81558272
Equivalent to 4 /8s, 220 /16s and 123 /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: 1284
Total LACNIC prefixes after maximum aggregation: 490
LACNIC Deaggregation factor: 2.62
Prefixes being announced from the LACNIC address blocks: 1291
Unique aggregates announced from the LACNIC address blocks: 682
LACNIC Region origin ASes present in the Internet Routing Table: 136
LACNIC Prefixes per ASN: 9.49
LACNIC Region origin ASes announcing only one prefix: 58
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: 61
Number of LACNIC addresses announced to Internet: 4611072
Equivalent to 0 /8s, 70 /16s and 92 /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: 1129
Total AfriNIC prefixes after maximum aggregation: 174
AfriNIC Deaggregation factor: 6.49
Prefixes being announced from the AfriNIC address blocks: 1136
Unique aggregates announced from the AfriNIC address blocks: 231
AfriNIC Region origin ASes present in the Internet Routing Table: 51
AfriNIC Prefixes per ASN: 22.27
AfriNIC Region origin ASes announcing only one prefix: 30
AfriNIC Region transit ASes present in the Internet Routing Table: 11
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: 29
Number of AfriNIC addresses announced to Internet: 2481664
Equivalent to 0 /8s, 37 /16s and 222 /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 452 180 24 CSTNET-AS-AP Computer Network Information
4538 195 4192 73 ERX-CERNET-BKB China Education and Resear
1237 194 74 146 KREONET-AS-KR KISTI, KR
58647 183 18 2 KAGAWAU-AS Kagawa University, JP
7575 174 297 117 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 5084 4936 2402 AMAZON-02, US
396982 2943 3660 456 GOOGLE-CLOUD-PLATFORM, US
714 1155 4392 5 APPLE-ENGINEERING, US
14618 1032 4446 792 AMAZON-AES, US
15169 945 2012 73 GOOGLE, US
8075 735 16019 617 MICROSOFT-CORP-MSN-AS-BLOCK, US
2152 534 507 99 CENIC-2152, US
2920 226 44 49 LACOE, US
668 212 647 180 DNIC-AS-00668, US
376 201 162 151 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 249 DFN Verein zur Foerderung eines Deutschen
786 196 1750 188 JANET Jisc Services Limited, GB
559 114 533 104 SWITCH Peering requests: peering at switch.c
8895 108 24 5 ISU Internet Services Unit ISU, SA
1103 98 1743 84 SURFNET-NL SURFnet, The Netherlands, NL
8987 91 244 66 AMAZON EXPANSION, IE
2614 90 26 70 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 157 10 69 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 541 82 3 KENET-AS, KE
2018 374 318 69 TENET-1, ZA
8094 47 48 18 PUKNET, ZA
37215 34 8 1 MAREN, MW
6879 24 2 9 ENSTINET-, EG
37661 13 8 5 NRaE1-AS, NG
37501 11 49 6 UOFS, ZA
37654 9 1 6 RwEdNet-AS, RW
36982 8 33 8 UCT, ZA
327947 6 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 5084 4936 2402 AMAZON-02, US
396982 2943 3660 456 GOOGLE-CLOUD-PLATFORM, US
714 1155 4392 5 APPLE-ENGINEERING, US
14618 1032 4446 792 AMAZON-AES, US
15169 945 2012 73 GOOGLE, US
8075 735 16019 617 MICROSOFT-CORP-MSN-AS-BLOCK, US
2907 624 2170 464 SINET-AS Research Organization of Informa
36914 541 82 3 KENET-AS, KE
2152 534 507 99 CENIC-2152, US
7497 452 180 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 2943 2487 GOOGLE-CLOUD-PLATFORM, US
714 1155 1150 APPLE-ENGINEERING, US
15169 945 872 GOOGLE, US
36914 541 538 KENET-AS, KE
2152 534 435 CENIC-2152, US
7497 452 428 CSTNET-AS-AP Computer Network Information Cente
2018 374 305 TENET-1, ZA
14618 1032 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
26971 UNALLOCATED 129.111.0.0/16 276 OTS-AS-276, US
65208 PRIVATE 206.206.156.0/22 11570 AS11570, US
65208 PRIVATE 216.161.32.0/23 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
103.165.160.0/24 Origin: 16509 AMAZON-02, US
103.165.160.0/24 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
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 /14:117 /15:234 /16:2424 /17:618 /18:601
/19:872 /20:3042 /21:1555 /22:2264 /23:2472 /24:18009
/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 834 5084 AMAZON-02, US
36914 517 541 KENET-AS, KE
14618 324 1032 AMAZON-AES, US
396982 270 2943 GOOGLE-CLOUD-PLATFORM, US
15169 268 945 GOOGLE, US
8075 136 735 MICROSOFT-CORP-MSN-AS-BLOCK, US
8895 105 108 ISU Internet Services Unit ISU, SA
2152 63 534 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 2:1 3:275 4:2 5:26 6:4
8:28 12:2 13:161 14:93 15:138 16:132
17:309 18:324 23:129 24:3 31:6 34:24
35:99 36:1 37:9 38:11 40:6 41:207
42:18 43:2 44:4 45:87 46:13 47:1
49:8 50:13 52:854 54:178 57:14 58:16
59:20 60:6 61:3 62:16 63:46 64:182
65:45 66:124 67:77 68:25 69:69 70:35
71:31 72:22 74:165 75:1 76:43 77:12
78:3 79:10 80:14 81:25 82:7 83:9
84:9 85:57 86:6 87:6 88:1 89:23
91:60 92:9 93:46 94:8 95:2 96:7
97:1 98:15 99:76 101:4 102:16 103:434
104:273 107:42 108:168 109:8 111:22 113:5
114:32 115:1 116:14 117:68 118:34 119:30
121:29 122:11 123:8 124:42 125:5 128:59
129:46 130:174 131:81 132:66 133:157 134:114
135:9 136:314 137:122 138:71 139:27 140:48
141:17 142:332 143:41 144:67 145:9 146:141
147:78 148:210 149:18 150:77 151:54 152:154
153:15 154:46 155:133 156:135 157:40 158:42
159:166 160:40 161:55 162:113 163:77 164:29
165:85 166:5 167:43 168:170 169:14 170:147
171:2 172:131 173:123 174:2 175:16 176:6
177:7 178:3 179:14 180:16 181:1 182:12
184:10 185:153 186:3 187:24 188:20 189:3
190:17 191:13 192:1723 193:333 194:142 195:90
196:147 197:331 198:653 199:410 200:300 201:39
202:664 203:470 204:466 205:224 206:256 207:361
208:175 209:280 210:225 211:4 212:159 213:22
214:10 216:262 217:18 218:23 219:6 220:17
222:4 223:15
End of report
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