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.

Thursday, May 10, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 11 May, 2012

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

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

BGP routing table entries examined: 400440
Prefixes after maximum aggregation: 171483
Deaggregation factor: 2.34
Unique aggregates announced to Internet: 198996
Total ASes present in the Internet Routing Table: 38478
Prefixes per ASN: 10.41
Origin-only ASes present in the Internet Routing Table: 33180
Origin ASes announcing only one prefix: 15673
Transit ASes present in the Internet Routing Table: 5298
Transit-only ASes present in the Internet Routing Table: 118
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: 1155
Unregistered ASNs in the Routing Table: 220
Number of 32-bit ASNs allocated by the RIRs: 2685
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 5796
Special use prefixes present in the Routing Table: 8
Prefixes being announced from unallocated address space: 113
Number of addresses announced to Internet: 2567902464
Equivalent to 153 /8s, 15 /16s and 21 /24s
Percentage of available address space announced: 69.3
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: 169536

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

Prefixes being announced by APNIC Region ASes: 94563
Total APNIC prefixes after maximum aggregation: 30935
APNIC Deaggregation factor: 3.06
Prefixes being announced from the APNIC address blocks: 92048
Unique aggregates announced from the APNIC address blocks: 39936
APNIC Region origin ASes present in the Internet Routing Table: 4641
APNIC Prefixes per ASN: 19.83
APNIC Region origin ASes announcing only one prefix: 1265
APNIC Region transit ASes present in the Internet Routing Table: 709
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: 644556544
Equivalent to 38 /8s, 107 /16s and 39 /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: 149368
Total ARIN prefixes after maximum aggregation: 76078
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 120544
Unique aggregates announced from the ARIN address blocks: 50704
ARIN Region origin ASes present in the Internet Routing Table: 15034
ARIN Prefixes per ASN: 8.02
ARIN Region origin ASes announcing only one prefix: 5742
ARIN Region transit ASes present in the Internet Routing Table: 1514
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: 810199552
Equivalent to 48 /8s, 74 /16s and 170 /24s
Percentage of available ARIN address space announced: 64.6

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, 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: 100320
Total RIPE prefixes after maximum aggregation: 54094
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92548
Unique aggregates announced from the RIPE address blocks: 58665
RIPE Region origin ASes present in the Internet Routing Table: 16536
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8058
RIPE Region transit ASes present in the Internet Routing Table: 2605
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: 512665344
Equivalent to 30 /8s, 142 /16s and 167 /24s
Percentage of available RIPE address space announced: 82.6

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: 40624
Total LACNIC prefixes after maximum aggregation: 8160
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 40756
Unique aggregates announced from the LACNIC address blocks: 20499
LACNIC Region origin ASes present in the Internet Routing Table: 1582
LACNIC Prefixes per ASN: 25.76
LACNIC Region origin ASes announcing only one prefix: 442
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: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 100112128
Equivalent to 5 /8s, 247 /16s and 151 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8941
Total AfriNIC prefixes after maximum aggregation: 2150
AfriNIC Deaggregation factor: 4.16
Prefixes being announced from the AfriNIC address blocks: 7008
Unique aggregates announced from the AfriNIC address blocks: 2228
AfriNIC Region origin ASes present in the Internet Routing Table: 530
AfriNIC Prefixes per ASN: 13.22
AfriNIC Region origin ASes announcing only one prefix: 166
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: 31764480
Equivalent to 1 /8s, 228 /16s and 176 /24s
Percentage of available AfriNIC address space announced: 47.3

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 1954 11106 707 Korea Telecom (KIX)
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
4755 1577 386 159 TATA Communications formerly
9829 1283 1069 30 National Internet Backbone
9583 1156 86 500 Sify Limited
7552 1131 1062 11 Vietel Corporation
24560 1025 382 175 Bharti Airtel Ltd., Telemedia
9498 966 291 65 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
6389 3416 3807 194 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
1785 1900 680 129 PaeTec Communications, Inc.
20115 1636 1566 620 Charter Communications
4323 1601 1060 382 tw telecom holdings, inc.
22773 1595 2911 115 Cox Communications Inc.
30036 1423 264 753 Mediacom Communications Corp
7018 1257 10071 827 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 1609 544 16 Corbina telecom
34984 690 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 671 670 68 France Telecom Espana SA
6830 656 2215 427 UPC Broadband
20940 643 215 509 Akamai Technologies European
9116 540 326 31 Goldenlines main autonomous s
8551 502 360 80 Bezeq International
3320 483 8442 399 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 1869 334 175 Types of queries are: POCs, o
28573 1841 1136 57 Types of queries are: POCs, o
6503 1517 418 68 Axtel, S.A.B. de C.V.
7303 1371 837 188 Telecom Argentina S.A.
8151 1335 2985 335 Uninet S.A. de C.V.
26615 903 761 33 Tim Celular S.A.
27947 669 74 98 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 579 244 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 1306 958 13 TEDATA
24863 842 274 32 LINKdotNET AS number
6713 482 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 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 160 666 86 MTN Network Solutions
29571 158 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 3416 3807 194 BellSouth.net Inc.
7029 3412 1016 171 Windstream Communications Inc
18566 2094 382 179 Covad Communications Co.
4766 1954 11106 707 Korea Telecom (KIX)
1785 1900 680 129 PaeTec Communications, Inc.
10620 1869 334 175 Types of queries are: POCs, o
28573 1841 1136 57 Types of queries are: POCs, o
17974 1779 510 73 PT Telekomunikasi Indonesia
7545 1658 301 85 TPG Internet Pty Ltd
20115 1636 1566 620 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 3412 3241 Windstream Communications Inc
18566 2094 1915 Covad Communications Co.
28573 1841 1784 Types of queries are: POCs, o
1785 1900 1771 PaeTec Communications, Inc.
17974 1779 1706 PT Telekomunikasi Indonesia
10620 1869 1694 Types of queries are: POCs, o
8402 1609 1593 Corbina telecom
7545 1658 1573 TPG Internet Pty Ltd
22773 1595 1480 Cox Communications Inc.
6503 1517 1449 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
5.32.168.0/21 15836 ARAX Autonomous System
5.33.0.0/16 9158 SONOFON (Autonomous System)
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

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 /11:82 /12:236
/13:456 /14:829 /15:1493 /16:12182 /17:6211 /18:10476
/19:20670 /20:29145 /21:30170 /22:39409 /23:37818 /24:210630
/25:11 /26:21 /27:20 /28:153 /29:148 /30:76
/31:0 /32:143

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

ASN No of nets Total ann. Description
7029 3051 3412 Windstream Communications Inc
6389 2134 3416 BellSouth.net Inc.
18566 2043 2094 Covad Communications Co.
10620 1715 1869 Types of queries are: POCs, o
8402 1587 1609 Corbina telecom
30036 1364 1423 Mediacom Communications Corp
6503 1274 1517 Axtel, S.A.B. de C.V.
11492 1149 1186 CABLE ONE, INC.
8452 1107 1306 TEDATA
7011 1069 1184 Frontier Communications of Am

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

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

1:540 2:629 4:14 5:1 6:3 8:409
12:1968 13:1 14:605 15:12 16:3 17:5
20:23 23:164 24:1764 27:1293 31:971 32:52
33:2 34:2 36:8 37:439 38:801 40:120
41:3101 42:136 44:3 46:1420 47:3 49:398
50:541 52:13 54:10 55:11 56:3 57:27
58:913 59:504 60:249 61:1182 62:985 63:2049
64:4171 65:2237 66:4456 67:2020 68:1165 69:3169
70:904 71:484 72:1825 74:2590 75:492 76:319
77:944 78:972 79:489 80:1218 81:910 82:673
83:548 84:486 85:1214 86:445 87:917 88:333
89:1685 90:290 91:4804 92:541 93:1467 94:1514
95:899 96:364 97:316 98:881 99:35 100:7
101:183 103:1043 106:103 107:187 108:266 109:1329
110:754 111:911 112:395 113:591 114:624 115:883
116:915 117:695 118:905 119:1193 120:344 121:786
122:1630 123:1098 124:1313 125:1244 128:521 129:189
130:246 131:626 132:174 133:22 134:237 135:62
136:213 137:175 138:333 139:181 140:466 141:242
142:390 143:426 144:524 145:70 146:491 147:281
148:749 149:305 150:150 151:180 152:464 153:172
154:11 155:418 156:216 157:336 158:178 159:475
160:337 161:236 162:344 163:181 164:582 165:389
166:571 167:467 168:856 169:125 170:866 171:130
172:2 173:1745 174:587 175:423 176:618 177:734
178:1359 180:1196 181:82 182:940 183:294 184:485
185:1 186:2263 187:1074 188:1262 189:1787 190:5574
192:5960 193:5290 194:3802 195:3209 196:1260 197:134
198:3599 199:4559 200:5724 201:1924 202:8298 203:8520
204:4252 205:2502 206:2665 207:2726 208:4066 209:3601
210:2678 211:1466 212:2035 213:1935 214:854 215:102
216:5088 217:1544 218:528 219:333 220:1227 221:541
222:294 223:328

End of report
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