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 15, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 16 May, 2012

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

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

BGP routing table entries examined: 400578
Prefixes after maximum aggregation: 171603
Deaggregation factor: 2.33
Unique aggregates announced to Internet: 199367
Total ASes present in the Internet Routing Table: 38504
Prefixes per ASN: 10.40
Origin-only ASes present in the Internet Routing Table: 33215
Origin ASes announcing only one prefix: 15670
Transit ASes present in the Internet Routing Table: 5289
Transit-only ASes present in the Internet Routing Table: 112
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: 1173
Unregistered ASNs in the Routing Table: 230
Number of 32-bit ASNs allocated by the RIRs: 2695
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5883
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 112
Number of addresses announced to Internet: 2570490880
Equivalent to 153 /8s, 54 /16s and 148 /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: 92.6
Total number of prefixes smaller than registry allocations: 169617

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

Prefixes being announced by APNIC Region ASes: 94314
Total APNIC prefixes after maximum aggregation: 30958
APNIC Deaggregation factor: 3.05
Prefixes being announced from the APNIC address blocks: 91793
Unique aggregates announced from the APNIC address blocks: 39986
APNIC Region origin ASes present in the Internet Routing Table: 4645
APNIC Prefixes per ASN: 19.76
APNIC Region origin ASes announcing only one prefix: 1261
APNIC Region transit ASes present in the Internet Routing Table: 703
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: 644587520
Equivalent to 38 /8s, 107 /16s and 160 /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: 149672
Total ARIN prefixes after maximum aggregation: 76143
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120707
Unique aggregates announced from the ARIN address blocks: 50839
ARIN Region origin ASes present in the Internet Routing Table: 15049
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5741
ARIN Region transit ASes present in the Internet Routing Table: 1518
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: 812007168
Equivalent to 48 /8s, 102 /16s and 63 /24s
Percentage of available ARIN address space announced: 64.7

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: 100289
Total RIPE prefixes after maximum aggregation: 54121
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92590
Unique aggregates announced from the RIPE address blocks: 58913
RIPE Region origin ASes present in the Internet Routing Table: 16537
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8054
RIPE Region transit ASes present in the Internet Routing Table: 2593
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: 513170432
Equivalent to 30 /8s, 150 /16s and 92 /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: 40583
Total LACNIC prefixes after maximum aggregation: 8157
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 40773
Unique aggregates announced from the LACNIC address blocks: 20448
LACNIC Region origin ASes present in the Internet Routing Table: 1586
LACNIC Prefixes per ASN: 25.71
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 291
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: 100299008
Equivalent to 5 /8s, 250 /16s and 113 /24s
Percentage of available LACNIC address space announced: 66.4

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: 9010
Total AfriNIC prefixes after maximum aggregation: 2157
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 7068
Unique aggregates announced from the AfriNIC address blocks: 2200
AfriNIC Region origin ASes present in the Internet Routing Table: 537
AfriNIC Prefixes per ASN: 13.16
AfriNIC Region origin ASes announcing only one prefix: 171
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 0
Number of AfriNIC addresses announced to Internet: 31793408
Equivalent to 1 /8s, 229 /16s and 33 /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 1976 11107 727 Korea Telecom (KIX)
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1661 301 88 TPG Internet Pty Ltd
4755 1552 384 152 TATA Communications formerly
9829 1278 1069 30 National Internet Backbone
9583 1156 86 500 Sify Limited
7552 1120 1062 11 Vietel Corporation
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 BHARTI Airtel Ltd.
4808 951 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
7029 3425 1016 170 Windstream Communications Inc
6389 3413 3807 195 BellSouth.net Inc.
18566 2094 382 179 Covad Communications Co.
1785 1904 680 130 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1605 2911 121 Cox Communications Inc.
4323 1569 1058 382 tw telecom holdings, inc.
30036 1411 262 750 Mediacom Communications Corp
7018 1226 10055 824 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 1290 544 16 Corbina telecom
34984 694 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 675 671 69 France Telecom Espana SA
6830 656 2215 426 UPC Broadband
20940 642 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 491 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG
3292 472 2108 406 TDC Data Networks

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 1865 334 177 Types of queries are: POCs, o
28573 1842 1153 59 Types of queries are: POCs, o
6503 1516 418 67 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1329 2986 330 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 666 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 99 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 1308 958 13 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 161 666 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
7029 3425 1016 170 Windstream Communications Inc
6389 3413 3807 195 BellSouth.net Inc.
18566 2094 382 179 Covad Communications Co.
4766 1976 11107 727 Korea Telecom (KIX)
1785 1904 680 130 PaeTec Communications, Inc.
10620 1865 334 177 Types of queries are: POCs, o
28573 1842 1153 59 Types of queries are: POCs, o
17974 1832 530 80 PT Telekomunikasi Indonesia
7545 1661 301 88 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
6389 3413 3218 BellSouth.net Inc.
18566 2094 1915 Covad Communications Co.
28573 1842 1783 Types of queries are: POCs, o
1785 1904 1774 PaeTec Communications, Inc.
17974 1832 1752 PT Telekomunikasi Indonesia
10620 1865 1688 Types of queries are: POCs, o
7545 1661 1573 TPG Internet Pty Ltd
22773 1605 1484 Cox Communications Inc.
6503 1516 1449 Axtel, S.A.B. de C.V.
4755 1552 1400 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
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
5.34.240.0/23 57858 Fiber Grid OU
5.34.246.0/23 57972 Deepak Mehta FIE
5.34.248.0/21 23456 32-bit ASN transition
5.35.160.0/21 8681 Jersey Telecoms Island Networ
5.39.0.0/17 16276 AS for Ovh
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

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 /12:236
/13:460 /14:830 /15:1492 /16:12191 /17:6211 /18:10483
/19:20679 /20:29202 /21:30222 /22:39505 /23:37907 /24:210456
/25:11 /26:20 /27:19 /28:151 /29:147 /30:74
/31:0 /32:139

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

ASN No of nets Total ann. Description
7029 3064 3425 Windstream Communications Inc
6389 2131 3413 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1712 1865 Types of queries are: POCs, o
30036 1352 1411 Mediacom Communications Corp
6503 1274 1516 Axtel, S.A.B. de C.V.
8402 1268 1290 Corbina telecom
11492 1149 1186 CABLE ONE, INC.
8452 1109 1308 TEDATA
7011 1070 1185 Frontier Communications of Am

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

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

1:541 2:531 4:14 5:10 6:3 8:411
12:1968 13:1 14:604 15:12 16:3 17:5
20:23 23:165 24:1766 27:1301 31:982 32:52
33:2 34:2 36:8 37:462 38:803 40:118
41:3125 42:136 44:3 46:1427 47:3 49:400
50:545 52:13 54:10 55:9 56:3 57:27
58:910 59:476 60:247 61:1121 62:990 63:2052
64:4164 65:2242 66:4454 67:2012 68:1163 69:3204
70:905 71:493 72:1822 74:2599 75:493 76:323
77:934 78:974 79:493 80:1211 81:908 82:671
83:552 84:488 85:1209 86:445 87:912 88:334
89:1695 90:290 91:4833 92:540 93:1322 94:1503
95:1010 96:362 97:316 98:877 99:35 100:7
101:185 103:1051 106:103 107:187 108:268 109:1325
110:752 111:915 112:398 113:585 114:624 115:823
116:913 117:696 118:904 119:1196 120:347 121:669
122:1627 123:1100 124:1319 125:1252 128:494 129:188
130:245 131:627 132:170 133:22 134:238 135:62
136:212 137:175 138:357 139:181 140:466 141:243
142:395 143:453 144:519 145:70 146:491 147:288
148:746 149:302 150:179 151:178 152:467 153:172
154:11 155:419 156:218 157:336 158:183 159:476
160:337 161:237 162:343 163:180 164:584 165:389
166:576 167:468 168:856 169:125 170:862 171:131
172:4 173:1738 174:575 175:422 176:586 177:740
178:1374 180:1200 181:82 182:947 183:294 184:490
185:1 186:2292 187:1083 188:1273 189:1790 190:5486
192:5960 193:5296 194:3805 195:3205 196:1255 197:135
198:3607 199:4591 200:5744 201:1915 202:8305 203:8497
204:4258 205:2501 206:2677 207:2728 208:4065 209:3610
210:2677 211:1485 212:2032 213:1938 214:859 215:103
216:5082 217:1534 218:530 219:308 220:1224 221:540
222:294 223:330

End of report
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