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.

Friday, May 18, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Sat 19 May, 2012

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

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

BGP routing table entries examined: 402033
Prefixes after maximum aggregation: 171752
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 199482
Total ASes present in the Internet Routing Table: 38534
Prefixes per ASN: 10.43
Origin-only ASes present in the Internet Routing Table: 33229
Origin ASes announcing only one prefix: 15695
Transit ASes present in the Internet Routing Table: 5305
Transit-only ASes present in the Internet Routing Table: 114
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 27
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 1144
Unregistered ASNs in the Routing Table: 226
Number of 32-bit ASNs allocated by the RIRs: 2716
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5930
Special use prefixes present in the Routing Table: 3
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2570552064
Equivalent to 153 /8s, 55 /16s and 131 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.4
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.7
Total number of prefixes smaller than registry allocations: 170451

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

Prefixes being announced by APNIC Region ASes: 94356
Total APNIC prefixes after maximum aggregation: 30952
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91572
Unique aggregates announced from the APNIC address blocks: 39986
APNIC Region origin ASes present in the Internet Routing Table: 4646
APNIC Prefixes per ASN: 19.71
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 710
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 644685824
Equivalent to 38 /8s, 109 /16s and 32 /24s
Percentage of available APNIC address space announced: 81.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
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, 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: 149983
Total ARIN prefixes after maximum aggregation: 76215
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120775
Unique aggregates announced from the ARIN address blocks: 50985
ARIN Region origin ASes present in the Internet Routing Table: 15056
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5749
ARIN Region transit ASes present in the Internet Routing Table: 1517
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 16
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 812247296
Equivalent to 48 /8s, 105 /16s and 233 /24s
Percentage of available ARIN address space announced: 64.8

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, 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, 173/8,
174/8, 184/8, 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: 101349
Total RIPE prefixes after maximum aggregation: 54225
RIPE Deaggregation factor: 1.87
Prefixes being announced from the RIPE address blocks: 93562
Unique aggregates announced from the RIPE address blocks: 58887
RIPE Region origin ASes present in the Internet Routing Table: 16559
RIPE Prefixes per ASN: 5.65
RIPE Region origin ASes announcing only one prefix: 8069
RIPE Region transit ASes present in the Internet Routing Table: 2598
Average RIPE Region AS path length visible: 3.6
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 513332736
Equivalent to 30 /8s, 152 /16s and 214 /24s
Percentage of available RIPE address space announced: 82.7

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
196608-198655
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,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 40772
Total LACNIC prefixes after maximum aggregation: 8138
LACNIC Deaggregation factor: 5.01
Prefixes being announced from the LACNIC address blocks: 40977
Unique aggregates announced from the LACNIC address blocks: 20445
LACNIC Region origin ASes present in the Internet Routing Table: 1585
LACNIC Prefixes per ASN: 25.85
LACNIC Region origin ASes announcing only one prefix: 445
LACNIC Region transit ASes present in the Internet Routing Table: 295
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 101106688
Equivalent to 6 /8s, 6 /16s and 196 /24s
Percentage of available LACNIC address space announced: 67.0

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9104
Total AfriNIC prefixes after maximum aggregation: 2158
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 7156
Unique aggregates announced from the AfriNIC address blocks: 2204
AfriNIC Region origin ASes present in the Internet Routing Table: 538
AfriNIC Prefixes per ASN: 13.30
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 117
Average AfriNIC Region AS path length visible: 3.5
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 0
Number of AfriNIC addresses announced to Internet: 31784192
Equivalent to 1 /8s, 228 /16s and 253 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 1969 11104 725 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
4755 1552 384 151 TATA Communications formerly
9829 1296 1085 28 National Internet Backbone
9583 1158 87 498 Sify Limited
7552 1127 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 64 BHARTI Airtel Ltd.
4808 946 1938 284 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 3415 3807 194 BellSouth.net Inc.
7029 3402 1016 170 Windstream Communications Inc
18566 2095 382 177 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1606 2911 121 Cox Communications Inc.
4323 1579 1058 382 tw telecom holdings, inc.
30036 1416 262 753 Mediacom Communications Corp
7018 1230 10055 826 AT&T Services, Inc.
7011 1187 317 681 Frontier Communications of Am

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 1556 544 16 Corbina telecom
34984 696 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 677 671 67 France Telecom Espana SA
2118 658 97 14 EUnet/RELCOM Autonomous Syste
6830 655 2215 426 UPC Broadband
20940 646 215 512 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 492 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG

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
10620 1902 337 202 Types of queries are: POCs, o
28573 1857 1153 59 Types of queries are: POCs, o
6503 1518 418 67 Axtel, S.A.B. de C.V.
7303 1435 901 191 Telecom Argentina S.A.
8151 1332 3010 330 Uninet S.A. de C.V.
26615 902 760 32 Tim Celular S.A.
27947 665 73 95 Telconet S.A
11172 644 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 581 244 98 Types of queries are: POCs, o

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
8452 1307 957 12 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
15706 164 32 6 Sudatel Internet Exchange Aut
16637 162 666 87 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system

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
6389 3415 3807 194 BellSouth.net Inc.
7029 3402 1016 170 Windstream Communications Inc
18566 2095 382 177 Covad Communications Co.
4766 1969 11104 725 Korea Telecom (KIX)
1785 1904 680 130 PaeTec Communications, Inc.
10620 1902 337 202 Types of queries are: POCs, o
28573 1857 1153 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1659 301 86 TPG Internet Pty Ltd
20115 1637 1566 619 Charter Communications

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

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

ASN No of nets Net Savings Description
7029 3402 3232 Windstream Communications Inc
18566 2095 1918 Covad Communications Co.
28573 1857 1798 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1902 1700 Types of queries are: POCs, o
7545 1659 1573 TPG Internet Pty Ltd
8402 1556 1540 Corbina telecom
22773 1606 1485 Cox Communications Inc.
6503 1518 1451 Axtel, S.A.B. de C.V.

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

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

Bad AS Designation Network Transit AS Description
65333 PRIVATE 10.0.0.0/8 0 *
32805 UNALLOCATED 12.1.225.0/24 7018 AT&T Services, Inc.
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T Services, Inc.
26095 UNALLOCATED 12.34.8.0/24 7018 AT&T Services, Inc.
21861 UNALLOCATED 12.37.59.0/24 7018 AT&T Services, Inc.
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T Services, Inc.
19577 UNALLOCATED 12.41.188.0/24 7832 WW/Precision Communi
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T Services, Inc.

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
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

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

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

Network Origin AS Description
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.222.79.0/24 36938 >>UNKNOWN<<

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 /8:20 /9:12 /10:30 /11:81 /12:235
/13:460 /14:830 /15:1492 /16:12199 /17:6232 /18:10499
/19:20686 /20:29293 /21:30312 /22:39688 /23:37954 /24:211716
/25:5 /26:14 /27:14 /28:25 /29:75 /30:42
/31:0 /32:119

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

ASN No of nets Total ann. Description
7029 3041 3402 Windstream Communications Inc
6389 2133 3415 BellSouth.net Inc.
18566 2044 2095 Covad Communications Co.
10620 1726 1902 Types of queries are: POCs, o
8402 1534 1556 Corbina telecom
30036 1357 1416 Mediacom Communications Corp
6503 1275 1518 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1109 1307 TEDATA
7011 1072 1187 Frontier Communications of Am

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

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

1:531 2:644 4:13 5:12 6:3 8:413
12:1969 13:1 14:605 15:12 16:3 17:5
20:23 23:170 24:1767 27:1284 31:983 32:52
33:2 34:2 36:8 37:473 38:804 40:119
41:3160 42:133 44:3 46:1421 47:3 49:399
50:545 52:13 54:10 55:9 56:3 57:28
58:911 59:476 60:247 61:1115 62:994 63:2045
64:4174 65:2248 66:4478 67:2011 68:1163 69:3201
70:905 71:489 72:1823 74:2597 75:491 76:327
77:933 78:979 79:486 80:1210 81:911 82:669
83:550 84:487 85:1210 86:443 87:920 88:333
89:1707 90:290 91:4849 92:546 93:1321 94:1526
95:1134 96:362 97:313 98:878 99:35 100:7
101:186 103:1064 106:103 107:185 108:278 109:1326
110:753 111:918 112:399 113:585 114:616 115:825
116:909 117:696 118:909 119:1194 120:348 121:677
122:1618 123:1098 124:1315 125:1249 128:515 129:189
130:245 131:630 132:171 133:22 134:239 135:62
136:212 137:239 138:359 139:182 140:467 141:243
142:395 143:562 144:521 145:70 146:497 147:299
148:749 149:295 150:184 151:177 152:467 153:172
154:11 155:419 156:220 157:337 158:185 159:477
160:339 161:242 162:344 163:179 164:601 165:402
166:570 167:469 168:858 169:125 170:871 171:131
172:4 173:1741 174:580 175:423 176:587 177:756
178:1372 180:1199 181:84 182:978 183:296 184:494
185:1 186:2299 187:1074 188:1272 189:1794 190:5483
192:5955 193:5444 194:4179 195:3214 196:1259 197:139
198:3609 199:4585 200:5718 201:1929 202:8315 203:8501
204:4258 205:2521 206:2679 207:2730 208:4055 209:3613
210:2675 211:1493 212:2031 213:1942 214:871 215:102
216:5078 217:1540 218:530 219:307 220:1234 221:539
222:295 223:326

End of report
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