The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Monday, August 12, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Tue 13 Aug, 2013

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/london/

Analysis Summary
----------------

BGP routing table entries examined: 456872
Prefixes after maximum aggregation: 185311
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 229015
Total ASes present in the Internet Routing Table: 40729
Prefixes per ASN: 11.22
Origin-only ASes present in the Internet Routing Table: 34972
Origin ASes announcing only one prefix: 16237
Transit ASes present in the Internet Routing Table: 5750
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 24
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 294315
Unregistered ASNs in the Routing Table: 24375
Number of 32-bit ASNs allocated by the RIRs: 4943
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11528
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 283
Number of addresses announced to Internet: 2654034688
Equivalent to 158 /8s, 49 /16s and 91 /24s
Percentage of available address space announced: 71.7
Percentage of allocated address space announced: 71.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.9
Total number of prefixes smaller than registry allocations: 159214

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes: 105792
Total APNIC prefixes after maximum aggregation: 32613
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108189
Unique aggregates announced from the APNIC address blocks: 46085
APNIC Region origin ASes present in the Internet Routing Table: 4827
APNIC Prefixes per ASN: 22.41
APNIC Region origin ASes announcing only one prefix: 1246
APNIC Region transit ASes present in the Internet Routing Table: 804
Average APNIC Region AS path length visible: 3.9
Max APNIC Region AS path length visible: 19
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 724486400
Equivalent to 43 /8s, 46 /16s and 201 /24s
Percentage of available APNIC address space announced: 84.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 158806
Total ARIN prefixes after maximum aggregation: 80317
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159436
Unique aggregates announced from the ARIN address blocks: 74642
ARIN Region origin ASes present in the Internet Routing Table: 15766
ARIN Prefixes per ASN: 10.11
ARIN Region origin ASes announcing only one prefix: 5998
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 20
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1069039872
Equivalent to 63 /8s, 184 /16s and 65 /24s
Percentage of available ARIN address space announced: 56.6

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, 393216-394239
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,
53/8, 54/8, 55/8, 56/8, 57/8, 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: 118585
Total RIPE prefixes after maximum aggregation: 60415
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 122416
Unique aggregates announced from the RIPE address blocks: 78493
RIPE Region origin ASes present in the Internet Routing Table: 17334
RIPE Prefixes per ASN: 7.06
RIPE Region origin ASes announcing only one prefix: 8230
RIPE Region transit ASes present in the Internet Routing Table: 2788
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 21
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 656791552
Equivalent to 39 /8s, 37 /16s and 216 /24s
Percentage of available RIPE address space announced: 95.5

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, 196608-199679
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
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: 49774
Total LACNIC prefixes after maximum aggregation: 9400
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 54298
Unique aggregates announced from the LACNIC address blocks: 25567
LACNIC Region origin ASes present in the Internet Routing Table: 1985
LACNIC Prefixes per ASN: 27.35
LACNIC Region origin ASes announcing only one prefix: 575
LACNIC Region transit ASes present in the Internet Routing Table: 359
Average LACNIC Region AS path length visible: 4.2
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 2
Number of LACNIC addresses announced to Internet: 134498304
Equivalent to 8 /8s, 4 /16s and 72 /24s
Percentage of available LACNIC address space announced: 80.2

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 plus 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: 11657
Total AfriNIC prefixes after maximum aggregation: 2526
AfriNIC Deaggregation factor: 4.61
Prefixes being announced from the AfriNIC address blocks: 12249
Unique aggregates announced from the AfriNIC address blocks: 3964
AfriNIC Region origin ASes present in the Internet Routing Table: 645
AfriNIC Prefixes per ASN: 18.99
AfriNIC Region origin ASes announcing only one prefix: 188
AfriNIC Region transit ASes present in the Internet Routing Table: 129
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1
Number of AfriNIC addresses announced to Internet: 46616064
Equivalent to 2 /8s, 199 /16s and 78 /24s
Percentage of available AfriNIC address space announced: 46.3

AfriNIC AS Blocks 36864-37887, 327680-328703 & 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
17974 2649 871 92 >>UNKNOWN<<
4766 2116 11553 619 Korea Telecom
7545 2046 320 111 TPG Telecom Limited
4755 1793 401 193 TATA Communications formerly
9829 1537 1221 45 >>UNKNOWN<<
9583 1222 92 507 Sify Limited
9498 1178 309 71 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1088 394 164 >>UNKNOWN<<
4808 1068 2022 309 CNCGROUP IP network China169

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 2979 3689 63 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
1785 2006 679 125 >>UNKNOWN<<
22773 2005 2927 123 >>UNKNOWN<<
20115 1675 1642 620 Charter Communications
4323 1624 1122 409 >>UNKNOWN<<
701 1520 11104 799 >>UNKNOWN<<
30036 1377 310 655 >>UNKNOWN<<
7018 1333 11326 843 >>UNKNOWN<<
11492 1220 218 363 >>UNKNOWN<<

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1661 544 16 >>UNKNOWN<<
34984 1291 241 215 >>UNKNOWN<<
31148 978 43 17 >>UNKNOWN<<
20940 972 350 748 >>UNKNOWN<<
2118 941 97 13 >>UNKNOWN<<
6830 872 2371 430 >>UNKNOWN<<
13188 843 99 70 >>UNKNOWN<<
8551 817 370 45 Bezeqint Internet Backbone
12479 682 797 53 >>UNKNOWN<<
9198 563 343 21 >>UNKNOWN<<

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
28573 3044 1595 110 >>UNKNOWN<<
10620 2659 422 227 >>UNKNOWN<<
7303 1730 1157 220 >>UNKNOWN<<
18881 1324 844 20 >>UNKNOWN<<
8151 1258 2757 385 >>UNKNOWN<<
11830 946 364 15 >>UNKNOWN<<
6503 814 434 65 Axtel, S.A.B. de C.V.
27947 810 95 92 Telconet S.A
6147 738 374 25 >>UNKNOWN<<
3816 726 303 85 >>UNKNOWN<<

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

ASN No of nets /20 equiv MaxAgg Description
36998 1861 112 5 MOBITEL
24863 873 274 30 >>UNKNOWN<<
6713 542 617 25 Itissalat Al-MAGHRIB
8452 439 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
36992 212 527 23 >>UNKNOWN<<
12258 193 28 71 MWEB-12258

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
28573 3044 1595 110 >>UNKNOWN<<
6389 2979 3689 63 BellSouth.net Inc.
10620 2659 422 227 >>UNKNOWN<<
17974 2649 871 92 >>UNKNOWN<<
4766 2116 11553 619 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2046 320 111 TPG Telecom Limited
1785 2006 679 125 >>UNKNOWN<<
22773 2005 2927 123 >>UNKNOWN<<
36998 1861 112 5 MOBITEL

Complete listing at http://thyme.rand.apnic.net/london/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
6389 2979 2916 BellSouth.net Inc.
17974 2649 2557 >>UNKNOWN<<
10620 2659 2432 >>UNKNOWN<<
7545 2046 1935 TPG Telecom Limited
22773 2005 1882 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
8402 1661 1645 >>UNKNOWN<<
4755 1793 1600 TATA Communications formerly

Complete listing at http://thyme.rand.apnic.net/london/data-CIDRnet

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
45271 UNALLOCATED 1.187.0.0/19 55644 >>UNKNOWN<<
45271 UNALLOCATED 1.187.32.0/19 55644 >>UNKNOWN<<
45271 UNALLOCATED 1.187.64.0/20 4755 TATA Communications
45271 UNALLOCATED 1.187.80.0/20 9498 BHARTI Airtel Ltd.
45271 UNALLOCATED 1.187.96.0/20 17917 >>UNKNOWN<<
45271 UNALLOCATED 1.187.112.0/20 9498 BHARTI Airtel Ltd.
45271 UNALLOCATED 1.187.128.0/20 17917 >>UNKNOWN<<
45271 UNALLOCATED 1.187.144.0/20 4755 TATA Communications
45271 UNALLOCATED 1.187.160.0/19 9498 BHARTI Airtel Ltd.
45271 UNALLOCATED 1.187.192.0/19 9498 BHARTI Airtel Ltd.

Complete listing at http://thyme.rand.apnic.net/london/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
10.0.0.0/8 65333 Internet Assigned Numbers Aut
100.64.0.0/10 65333 Internet Assigned Numbers Aut
169.254.0.0/16 65333 Internet Assigned Numbers Aut
172.16.0.0/12 65333 Internet Assigned Numbers Aut
192.0.0.0/24 65333 Internet Assigned Numbers Aut
192.0.2.0/24 65333 Internet Assigned Numbers Aut
192.168.0.0/16 0 *
198.18.0.0/15 65333 Internet Assigned Numbers Aut
198.51.100.0/24 65333 Internet Assigned Numbers Aut
203.0.113.0/24 65333 Internet Assigned Numbers Aut

Complete listing at http://thyme.rand.apnic.net/london/data-dsua

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
27.54.116.0/24 55452 >>UNKNOWN<<
27.54.116.0/22 55452 >>UNKNOWN<<
27.54.119.0/24 55452 >>UNKNOWN<<
62.61.220.0/24 24974 >>UNKNOWN<<
62.61.221.0/24 24974 >>UNKNOWN<<
62.182.96.0/23 15830 >>UNKNOWN<<
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.

Complete listing at http://thyme.rand.apnic.net/london/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 /8:17 /9:11 /10:31 /11:92 /12:251
/13:478 /14:903 /15:1603 /16:12702 /17:6645 /18:10977
/19:22536 /20:32287 /21:34683 /22:48291 /23:42407 /24:242346
/25:8 /26:11 /27:10 /28:132 /29:201 /30:119
/31:0 /32:131

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1713 2979 BellSouth.net Inc.
8402 1363 1661 >>UNKNOWN<<
22773 1304 2005 >>UNKNOWN<<
30036 1239 1377 >>UNKNOWN<<
11492 1181 1220 >>UNKNOWN<<
1785 1079 2006 >>UNKNOWN<<
6983 1023 1150 ITC^Deltacom
10620 990 2659 >>UNKNOWN<<

Complete listing at http://thyme.rand.apnic.net/london/data-sXXas-nos

Number of /24s announced per /8 block (Global)
----------------------------------------------

1:794 2:773 3:3 4:16 5:906 6:17
8:590 11:1 12:1892 13:2 14:842 15:11
16:3 17:10 18:19 20:17 23:308 24:1763
27:1534 31:1361 32:40 33:2 34:5 36:67
37:1811 38:890 39:2 40:180 41:3284 42:240
44:8 46:1958 47:4 49:658 50:804 52:12
54:37 55:5 57:29 58:1089 59:636 60:329
61:1477 62:1184 63:2003 64:4333 65:2151 66:4193
67:2040 68:1090 69:3293 70:800 71:475 72:1917
74:2510 75:325 76:302 77:1111 78:1051 79:615
80:1297 81:1016 82:658 83:585 84:566 85:1218
86:474 87:1037 88:534 89:1819 90:153 91:5554
92:619 93:1657 94:1994 95:1609 96:584 97:346
98:1029 99:40 100:28 101:346 103:3118 105:521
106:139 107:207 108:502 109:1854 110:930 111:1067
112:567 113:808 114:687 115:1057 116:943 117:786
118:1115 119:1269 120:346 121:847 122:1765 123:1242
124:1335 125:1409 128:605 129:201 130:296 131:658
132:342 133:160 134:264 135:72 136:259 137:238
138:344 139:185 140:173 141:307 142:514 143:386
144:527 145:93 146:528 147:412 148:661 149:350
150:156 151:591 152:412 153:191 154:29 155:416
156:271 157:356 158:276 159:659 160:349 161:428
162:560 163:203 164:572 165:524 166:255 167:602
168:1025 169:125 170:1070 171:188 172:23 173:1579
174:563 175:479 176:1157 177:2143 178:1911 179:93
180:1504 181:624 182:1217 183:418 184:650 185:738
186:2372 187:1388 188:1844 189:1283 190:6940 192:6809
193:5525 194:4598 195:3598 196:1327 197:1011 198:4531
199:5341 200:5982 201:2627 202:8684 203:8815 204:4450
205:2579 206:2738 207:2831 208:3993 209:3582 210:2823
211:1524 212:2291 213:2046 214:889 215:101 216:5205
217:1652 218:607 219:325 220:1274 221:551 222:320
223:459

End of report
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