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, July 19, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 20 Jul, 2012

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

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

BGP routing table entries examined: 410871
Prefixes after maximum aggregation: 173868
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 203341
Total ASes present in the Internet Routing Table: 38791
Prefixes per ASN: 10.59
Origin-only ASes present in the Internet Routing Table: 33409
Origin ASes announcing only one prefix: 15736
Transit ASes present in the Internet Routing Table: 5382
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: 28
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 1033
Unregistered ASNs in the Routing Table: 176
Number of 32-bit ASNs allocated by the RIRs: 3007
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6739
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 171
Number of addresses announced to Internet: 2586745088
Equivalent to 154 /8s, 46 /16s and 153 /24s
Percentage of available address space announced: 69.8
Percentage of allocated address space announced: 69.9
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.0
Total number of prefixes smaller than registry allocations: 141630

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

Prefixes being announced by APNIC Region ASes: 96171
Total APNIC prefixes after maximum aggregation: 31182
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 97228
Unique aggregates announced from the APNIC address blocks: 42047
APNIC Region origin ASes present in the Internet Routing Table: 4676
APNIC Prefixes per ASN: 20.79
APNIC Region origin ASes announcing only one prefix: 1277
APNIC Region transit ASes present in the Internet Routing Table: 729
Average APNIC Region AS path length visible: 4.1
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: 702164224
Equivalent to 41 /8s, 218 /16s and 45 /24s
Percentage of available APNIC address space announced: 82.1

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: 151597
Total ARIN prefixes after maximum aggregation: 77024
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152573
Unique aggregates announced from the ARIN address blocks: 68556
ARIN Region origin ASes present in the Internet Routing Table: 15141
ARIN Prefixes per ASN: 10.08
ARIN Region origin ASes announcing only one prefix: 5760
ARIN Region transit ASes present in the Internet Routing Table: 1523
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 19
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 1071600128
Equivalent to 63 /8s, 223 /16s and 82 /24s
Percentage of available ARIN address space announced: 56.7

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, 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: 104280
Total RIPE prefixes after maximum aggregation: 55194
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 106440
Unique aggregates announced from the RIPE address blocks: 67337
RIPE Region origin ASes present in the Internet Routing Table: 16675
RIPE Prefixes per ASN: 6.38
RIPE Region origin ASes announcing only one prefix: 8094
RIPE Region transit ASes present in the Internet Routing Table: 2642
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 636958464
Equivalent to 37 /8s, 247 /16s and 55 /24s
Percentage of available RIPE address space announced: 92.6

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
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: 41913
Total LACNIC prefixes after maximum aggregation: 8251
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 44578
Unique aggregates announced from the LACNIC address blocks: 21841
LACNIC Region origin ASes present in the Internet Routing Table: 1594
LACNIC Prefixes per ASN: 27.97
LACNIC Region origin ASes announcing only one prefix: 430
LACNIC Region transit ASes present in the Internet Routing Table: 303
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 112402432
Equivalent to 6 /8s, 179 /16s and 32 /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,
191/8, 200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes: 9444
Total AfriNIC prefixes after maximum aggregation: 2162
AfriNIC Deaggregation factor: 4.37
Prefixes being announced from the AfriNIC address blocks: 9880
Unique aggregates announced from the AfriNIC address blocks: 3414
AfriNIC Region origin ASes present in the Internet Routing Table: 553
AfriNIC Prefixes per ASN: 17.87
AfriNIC Region origin ASes announcing only one prefix: 175
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: 41012736
Equivalent to 2 /8s, 113 /16s and 206 /24s
Percentage of available AfriNIC address space announced: 40.7

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 2230 563 82 PT Telekomunikasi Indonesia
4766 2007 11111 775 Korea Telecom (KIX)
7545 1688 301 88 TPG Internet Pty Ltd
4755 1598 387 161 TATA Communications formerly
9829 1304 1085 28 National Internet Backbone
9583 1162 88 509 Sify Limited
7552 1079 1062 11 Vietel Corporation
24560 1036 385 165 Bharti Airtel Ltd., Telemedia
9498 985 291 69 BHARTI Airtel Ltd.
4808 963 1942 288 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 3413 985 156 Windstream Communications Inc
6389 3387 3773 187 BellSouth.net Inc.
18566 2089 382 181 Covad Communications Co.
1785 1938 681 132 PaeTec Communications, Inc.
22773 1679 2911 122 Cox Communications Inc.
20115 1648 1571 615 Charter Communications
4323 1575 1044 381 tw telecom holdings, inc.
30036 1389 270 778 Mediacom Communications Corp
7018 1260 10072 830 AT&T Services, Inc.
7011 1191 316 697 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 1588 544 16 Corbina telecom
2118 1023 97 14 EUnet/RELCOM Autonomous Syste
12479 796 742 93 France Telecom Espana SA
34984 730 189 174 BILISIM TELEKOM
6830 709 2302 443 UPC Broadband
31148 705 37 9 FreeNet ISP
20940 655 214 523 Akamai Technologies European
13188 628 100 10 Ukraine
8551 602 364 61 Bezeq International
9116 539 326 31 Goldenlines main autonomous s

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 2011 348 208 Types of queries are: POCs, o
28573 2011 1221 55 Types of queries are: POCs, o
6503 1513 418 67 Axtel, S.A.B. de C.V.
7303 1458 934 196 Telecom Argentina S.A.
8151 1327 3025 339 Uninet S.A. de C.V.
6458 859 81 15 Telgua
27947 692 74 88 Telconet S.A
11172 645 107 75 Alestra, S. de R.L. de C.V.
3816 599 250 83 Types of queries are: POCs, o
22047 583 326 15 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 998 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 435 48 3 MOBITEL
24835 286 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
29571 160 15 15 Ci Telecom Autonomous system
15706 159 32 6 Sudatel Internet Exchange Aut

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 3413 985 156 Windstream Communications Inc
6389 3387 3773 187 BellSouth.net Inc.
17974 2230 563 82 PT Telekomunikasi Indonesia
18566 2089 382 181 Covad Communications Co.
10620 2011 348 208 Types of queries are: POCs, o
28573 2011 1221 55 Types of queries are: POCs, o
4766 2007 11111 775 Korea Telecom (KIX)
1785 1938 681 132 PaeTec Communications, Inc.
7545 1688 301 88 TPG Internet Pty Ltd
22773 1679 2911 122 Cox Communications Inc.

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 3387 3200 BellSouth.net Inc.
17974 2230 2148 PT Telekomunikasi Indonesia
28573 2011 1956 Types of queries are: POCs, o
18566 2089 1908 Covad Communications Co.
1785 1938 1806 PaeTec Communications, Inc.
10620 2011 1803 Types of queries are: POCs, o
7545 1688 1600 TPG Internet Pty Ltd
8402 1588 1572 Corbina telecom
22773 1679 1557 Cox Communications Inc.
6503 1513 1446 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
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.
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.

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
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
5.150.192.0/18 8473 Bahnhof Autonomous System
5.153.64.0/19 12703 edNETs 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
/13:469 /14:842 /15:1515 /16:12249 /17:6375 /18:10653
/19:20799 /20:29687 /21:31275 /22:40744 /23:39010 /24:216303
/25:11 /26:22 /27:19 /28:150 /29:149 /30:83
/31:0 /32:137

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

ASN No of nets Total ann. Description
7029 2772 3413 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1866 3387 BellSouth.net Inc.
30036 1324 1389 Mediacom Communications Corp
8402 1295 1588 Corbina telecom
11492 1154 1191 CABLE ONE, INC.
22773 1106 1679 Cox Communications Inc.
6503 1047 1513 Axtel, S.A.B. de C.V.
1785 1045 1938 PaeTec Communications, Inc.
7011 930 1191 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 2:727 3:1 4:13 5:152 6:3
8:435 12:1977 13:1 14:629 15:11 16:3
17:5 20:24 23:194 24:1792 27:1328 31:1039
32:51 33:2 34:2 36:8 37:651 38:818
39:1 40:128 41:2875 42:142 44:3 46:1522
47:2 49:432 50:553 52:13 54:14 55:8
56:1 57:38 58:922 59:526 60:240 61:1234
62:923 63:2029 64:4240 65:2240 66:4481 67:2014
68:1156 69:3183 70:986 71:514 72:1873 74:2604
75:489 76:334 77:929 78:934 79:492 80:1226
81:950 82:637 83:536 84:506 85:1148 86:430
87:928 88:346 89:1673 90:301 91:5039 92:577
93:1300 94:1561 95:1193 96:400 97:323 98:884
99:36 100:22 101:254 103:1264 105:416 106:115
107:189 108:361 109:1455 110:768 111:935 112:420
113:630 114:649 115:900 116:889 117:718 118:902
119:1174 120:351 121:785 122:1630 123:1157 124:1310
125:1260 128:509 129:180 130:256 131:631 132:294
133:22 134:231 135:61 136:214 137:238 138:333
139:174 140:470 141:252 142:413 143:367 144:473
145:77 146:506 147:284 148:747 149:319 150:145
151:186 152:471 153:176 154:18 155:424 156:222
157:337 158:190 159:550 160:340 161:251 162:377
163:181 164:664 165:409 166:588 167:533 168:909
169:126 170:898 171:149 172:4 173:1734 174:609
175:428 176:563 177:949 178:1646 180:1309 181:112
182:971 183:231 184:551 186:1995 187:1077 188:1370
189:1576 190:6116 192:5968 193:5541 194:4484 195:3228
196:1206 197:176 198:3645 199:4881 200:5888 201:1963
202:8393 203:8561 204:4326 205:2529 206:2699 207:2768
208:4036 209:3615 210:2715 211:1543 212:1979 213:1826
214:873 215:81 216:5071 217:1570 218:548 219:320
220:1226 221:552 222:300 223:336

End of report
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