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.

Tuesday, May 1, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 02 May, 2012

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

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

BGP routing table entries examined: 400554
Prefixes after maximum aggregation: 170988
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198283
Total ASes present in the Internet Routing Table: 38428
Prefixes per ASN: 10.42
Origin-only ASes present in the Internet Routing Table: 33129
Origin ASes announcing only one prefix: 15659
Transit ASes present in the Internet Routing Table: 5299
Transit-only ASes present in the Internet Routing Table: 117
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: 1209
Unregistered ASNs in the Routing Table: 223
Number of 32-bit ASNs allocated by the RIRs: 2656
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5669
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2562434048
Equivalent to 152 /8s, 187 /16s and 164 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.5
Total number of prefixes smaller than registry allocations: 169486

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

Prefixes being announced by APNIC Region ASes: 93724
Total APNIC prefixes after maximum aggregation: 30879
APNIC Deaggregation factor: 3.04
Prefixes being announced from the APNIC address blocks: 91227
Unique aggregates announced from the APNIC address blocks: 39922
APNIC Region origin ASes present in the Internet Routing Table: 4640
APNIC Prefixes per ASN: 19.66
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 708
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: 644155904
Equivalent to 38 /8s, 101 /16s and 10 /24s
Percentage of available APNIC address space announced: 81.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 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: 149041
Total ARIN prefixes after maximum aggregation: 75864
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120360
Unique aggregates announced from the ARIN address blocks: 50545
ARIN Region origin ASes present in the Internet Routing Table: 15003
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5734
ARIN Region transit ASes present in the Internet Routing Table: 1515
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: 807206656
Equivalent to 48 /8s, 28 /16s and 255 /24s
Percentage of available ARIN address space announced: 64.4

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: 102046
Total RIPE prefixes after maximum aggregation: 53872
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 94021
Unique aggregates announced from the RIPE address blocks: 58433
RIPE Region origin ASes present in the Internet Routing Table: 16515
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 8049
RIPE Region transit ASes present in the Internet Routing Table: 2598
Average RIPE Region AS path length visible: 3.5
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: 511378688
Equivalent to 30 /8s, 123 /16s and 5 /24s
Percentage of available RIPE address space announced: 82.4

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: 40336
Total LACNIC prefixes after maximum aggregation: 8157
LACNIC Deaggregation factor: 4.94
Prefixes being announced from the LACNIC address blocks: 40424
Unique aggregates announced from the LACNIC address blocks: 20317
LACNIC Region origin ASes present in the Internet Routing Table: 1582
LACNIC Prefixes per ASN: 25.55
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 289
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 99721216
Equivalent to 5 /8s, 241 /16s and 160 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8918
Total AfriNIC prefixes after maximum aggregation: 2148
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 6969
Unique aggregates announced from the AfriNIC address blocks: 2224
AfriNIC Region origin ASes present in the Internet Routing Table: 532
AfriNIC Prefixes per ASN: 13.10
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 118
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: 31784448
Equivalent to 1 /8s, 228 /16s and 254 /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 1915 11105 694 Korea Telecom (KIX)
17974 1776 510 74 PT Telekomunikasi Indonesia
7545 1659 301 88 TPG Internet Pty Ltd
4755 1553 384 153 TATA Communications formerly
9829 1260 1069 30 National Internet Backbone
9583 1150 85 495 Sify Limited
7552 1100 1062 11 Vietel Corporation
24560 1024 385 167 Bharti Airtel Ltd., Telemedia
9498 958 291 65 BHARTI Airtel Ltd.
4808 955 1938 286 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 3426 3807 195 BellSouth.net Inc.
7029 3407 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
1785 1908 680 129 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1597 1060 384 tw telecom holdings, inc.
22773 1589 2911 115 Cox Communications Inc.
30036 1424 261 768 Mediacom Communications Corp
7018 1248 9806 821 AT&T Services, Inc.
11492 1186 216 364 CABLE ONE, INC.

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 1579 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 684 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
6830 655 2215 426 UPC Broadband
12479 646 668 66 France Telecom Espana SA
20940 628 207 501 Akamai Technologies European
9116 541 326 32 Goldenlines main autonomous s
3320 531 8441 397 Deutsche Telekom AG
8551 501 360 80 Bezeq International

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 1854 332 179 Types of queries are: POCs, o
28573 1816 1114 62 Types of queries are: POCs, o
6503 1522 418 66 Axtel, S.A.B. de C.V.
7303 1362 829 187 Telecom Argentina S.A.
8151 1339 2981 337 Uninet S.A. de C.V.
26615 904 761 33 Tim Celular S.A.
27947 663 74 98 Telconet S.A
11172 643 107 74 Alestra, S. de R.L. de C.V.
22047 582 326 15 Types of queries are: POCs, o
3816 575 242 100 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 958 13 TEDATA
24863 840 274 32 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 163 666 86 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 3426 3807 195 BellSouth.net Inc.
7029 3407 1016 171 Windstream Communications Inc
18566 2092 382 179 Covad Communications Co.
4766 1915 11105 694 Korea Telecom (KIX)
1785 1908 680 129 PaeTec Communications, Inc.
10620 1854 332 179 Types of queries are: POCs, o
28573 1816 1114 62 Types of queries are: POCs, o
17974 1776 510 74 PT Telekomunikasi Indonesia
7545 1659 301 88 TPG Internet Pty Ltd
20115 1639 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 3407 3236 Windstream Communications Inc
18566 2092 1913 Covad Communications Co.
1785 1908 1779 PaeTec Communications, Inc.
28573 1816 1754 Types of queries are: POCs, o
17974 1776 1702 PT Telekomunikasi Indonesia
10620 1854 1675 Types of queries are: POCs, o
7545 1659 1571 TPG Internet Pty Ltd
8402 1579 1563 Corbina telecom
22773 1589 1474 Cox Communications Inc.
6503 1522 1456 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.
32567 UNALLOCATED 12.14.170.0/24 7018 AT&T Services, Inc.
16504 UNALLOCATED 12.18.155.0/24 30170 Optic Fusion
32567 UNALLOCATED 12.25.107.0/24 4323 tw telecom holdings,
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.

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
169.254.0.0/16 65333 Internet Assigned Numbers Aut
172.16.0.0/12 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

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

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

Network Origin AS Description
5.10.144.0/20 25160 Vorboss LTD AS Number
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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind

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 /10:29 /11:81 /12:235
/13:461 /14:830 /15:1488 /16:12186 /17:6215 /18:10471
/19:20631 /20:28872 /21:29766 /22:40089 /23:37693 /24:210917
/25:11 /26:21 /27:19 /28:152 /29:147 /30:73
/31:0 /32:135

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

ASN No of nets Total ann. Description
7029 3046 3407 Windstream Communications Inc
6389 2143 3426 BellSouth.net Inc.
18566 2041 2092 Covad Communications Co.
10620 1712 1854 Types of queries are: POCs, o
8402 1557 1579 Corbina telecom
30036 1368 1424 Mediacom Communications Corp
6503 1281 1522 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1108 1307 TEDATA
1785 1072 1908 PaeTec Communications, Inc.

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

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

1:535 2:539 4:14 6:3 8:405 12:1953
13:1 14:602 15:12 16:3 17:5 20:23
23:165 24:1754 27:1270 31:972 32:52 33:2
34:2 36:8 37:425 38:791 40:118 41:3103
42:134 44:3 46:1485 47:3 49:411 50:541
52:13 54:10 55:9 56:3 57:27 58:911
59:484 60:248 61:1099 62:977 63:2003 64:4168
65:2253 66:4458 67:2035 68:1163 69:3175 70:902
71:484 72:1827 74:2612 75:494 76:317 77:940
78:972 79:485 80:1207 81:905 82:663 83:545
84:480 85:1198 86:418 87:931 88:340 89:1615
90:291 91:4770 92:520 93:1506 94:1502 95:891
96:353 97:315 98:894 99:34 100:7 101:181
103:1001 106:102 107:190 108:254 109:1312 110:742
111:919 112:442 113:580 114:636 115:800 116:905
117:701 118:905 119:1188 120:345 121:670 122:1628
123:1101 124:1314 125:1242 128:518 129:188 130:248
131:616 132:170 133:22 134:235 135:62 136:212
137:173 138:356 139:161 140:459 141:246 142:388
143:392 144:516 145:74 146:494 147:280 148:750
149:305 150:150 151:180 152:462 153:172 154:11
155:416 156:211 157:331 158:176 159:469 160:337
161:236 162:345 163:181 164:576 165:401 166:572
167:467 168:816 169:127 170:861 171:127 172:2
173:1762 174:577 175:424 176:677 177:699 178:1361
180:1194 181:82 182:804 183:290 184:464 185:1
186:2239 187:1055 188:1225 189:1788 190:5538 192:5972
193:5550 194:4652 195:3592 196:1253 197:135 198:3605
199:4516 200:5725 201:1928 202:8244 203:8516 204:4248
205:2483 206:2658 207:2732 208:4043 209:3604 210:2660
211:1455 212:2008 213:1925 214:839 215:103 216:5102
217:1527 218:529 219:314 220:1227 221:539 222:296
223:320

End of report
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