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.

Sunday, July 15, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 409219
Prefixes after maximum aggregation: 173655
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 202797
Total ASes present in the Internet Routing Table: 38748
Prefixes per ASN: 10.56
Origin-only ASes present in the Internet Routing Table: 33389
Origin ASes announcing only one prefix: 15722
Transit ASes present in the Internet Routing Table: 5359
Transit-only ASes present in the Internet Routing Table: 116
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 26
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 1029
Unregistered ASNs in the Routing Table: 172
Number of 32-bit ASNs allocated by the RIRs: 2990
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6740
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 168
Number of addresses announced to Internet: 2584270080
Equivalent to 154 /8s, 8 /16s and 213 /24s
Percentage of available address space announced: 69.7
Percentage of allocated address space announced: 69.8
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: 140694

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

Prefixes being announced by APNIC Region ASes: 95899
Total APNIC prefixes after maximum aggregation: 31176
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 96944
Unique aggregates announced from the APNIC address blocks: 42022
APNIC Region origin ASes present in the Internet Routing Table: 4673
APNIC Prefixes per ASN: 20.75
APNIC Region origin ASes announcing only one prefix: 1275
APNIC Region transit ASes present in the Internet Routing Table: 722
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: 702071040
Equivalent to 41 /8s, 216 /16s and 193 /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: 151236
Total ARIN prefixes after maximum aggregation: 76996
ARIN Deaggregation factor: 1.96
Prefixes being announced from the ARIN address blocks: 152236
Unique aggregates announced from the ARIN address blocks: 68432
ARIN Region origin ASes present in the Internet Routing Table: 15131
ARIN Prefixes per ASN: 10.06
ARIN Region origin ASes announcing only one prefix: 5758
ARIN Region transit ASes present in the Internet Routing Table: 1525
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: 1070844928
Equivalent to 63 /8s, 211 /16s and 204 /24s
Percentage of available ARIN address space announced: 56.6

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, 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: 103775
Total RIPE prefixes after maximum aggregation: 55058
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 105948
Unique aggregates announced from the RIPE address blocks: 67075
RIPE Region origin ASes present in the Internet Routing Table: 16643
RIPE Prefixes per ASN: 6.37
RIPE Region origin ASes announcing only one prefix: 8081
RIPE Region transit ASes present in the Internet Routing Table: 2631
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 26
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 635320832
Equivalent to 37 /8s, 222 /16s and 58 /24s
Percentage of available RIPE address space announced: 92.4

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
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: 41822
Total LACNIC prefixes after maximum aggregation: 8240
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 44494
Unique aggregates announced from the LACNIC address blocks: 21786
LACNIC Region origin ASes present in the Internet Routing Table: 1598
LACNIC Prefixes per ASN: 27.84
LACNIC Region origin ASes announcing only one prefix: 433
LACNIC Region transit ASes present in the Internet Routing Table: 301
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: 112245248
Equivalent to 6 /8s, 176 /16s and 186 /24s
Percentage of available LACNIC address space announced: 66.9

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: 9018
Total AfriNIC prefixes after maximum aggregation: 2131
AfriNIC Deaggregation factor: 4.23
Prefixes being announced from the AfriNIC address blocks: 9428
Unique aggregates announced from the AfriNIC address blocks: 3339
AfriNIC Region origin ASes present in the Internet Routing Table: 554
AfriNIC Prefixes per ASN: 17.02
AfriNIC Region origin ASes announcing only one prefix: 175
AfriNIC Region transit ASes present in the Internet Routing Table: 122
Average AfriNIC Region AS path length visible: 3.3
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: 41212928
Equivalent to 2 /8s, 116 /16s and 220 /24s
Percentage of available AfriNIC address space announced: 40.9

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 2142 558 80 PT Telekomunikasi Indonesia
4766 2001 11108 770 Korea Telecom (KIX)
7545 1687 301 87 TPG Internet Pty Ltd
4755 1595 387 160 TATA Communications formerly
9829 1303 1085 28 National Internet Backbone
9583 1168 88 506 Sify Limited
7552 1080 1062 11 Vietel Corporation
24560 1036 385 165 Bharti Airtel Ltd., Telemedia
9498 981 291 67 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
6389 3389 3773 187 BellSouth.net Inc.
7029 3313 986 161 Windstream Communications Inc
18566 2089 382 181 Covad Communications Co.
1785 1936 680 131 PaeTec Communications, Inc.
22773 1663 2911 121 Cox Communications Inc.
20115 1649 1571 615 Charter Communications
4323 1572 1059 383 tw telecom holdings, inc.
30036 1389 269 781 Mediacom Communications Corp
7018 1266 10077 830 AT&T Services, Inc.
7011 1197 320 696 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 1534 544 16 Corbina telecom
2118 1023 97 14 EUnet/RELCOM Autonomous Syste
12479 796 741 94 France Telecom Espana SA
34984 728 189 174 BILISIM TELEKOM
6830 708 2292 442 UPC Broadband
31148 704 37 9 FreeNet ISP
20940 667 219 528 Akamai Technologies European
8551 603 364 61 Bezeq International
13188 555 100 10 Ukraine
9116 511 326 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
28573 2007 1214 55 Types of queries are: POCs, o
10620 1991 346 208 Types of queries are: POCs, o
6503 1512 418 66 Axtel, S.A.B. de C.V.
7303 1454 934 194 Telecom Argentina S.A.
8151 1326 3025 341 Uninet S.A. de C.V.
6458 853 81 15 Telgua
27947 691 74 88 Telconet S.A
11172 645 107 75 Alestra, S. de R.L. de C.V.
3816 593 248 90 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 1106 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 508 649 18 Itissalat Al-MAGHRIB
24835 285 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
15706 159 32 6 Sudatel Internet Exchange Aut
29571 158 15 15 Ci Telecom Autonomous system
16637 157 664 87 MTN Network Solutions

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 3389 3773 187 BellSouth.net Inc.
7029 3313 986 161 Windstream Communications Inc
17974 2142 558 80 PT Telekomunikasi Indonesia
18566 2089 382 181 Covad Communications Co.
28573 2007 1214 55 Types of queries are: POCs, o
4766 2001 11108 770 Korea Telecom (KIX)
10620 1991 346 208 Types of queries are: POCs, o
1785 1936 680 131 PaeTec Communications, Inc.
7545 1687 301 87 TPG Internet Pty Ltd
22773 1663 2911 121 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
7029 3313 3152 Windstream Communications Inc
17974 2142 2062 PT Telekomunikasi Indonesia
28573 2007 1952 Types of queries are: POCs, o
18566 2089 1908 Covad Communications Co.
1785 1936 1805 PaeTec Communications, Inc.
10620 1991 1783 Types of queries are: POCs, o
7545 1687 1600 TPG Internet Pty Ltd
22773 1663 1542 Cox Communications Inc.
8402 1534 1518 Corbina telecom
6503 1512 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
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
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
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
41.222.80.0/21 37110 Moztel LDA

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 /14:841 /15:1513 /16:12227 /17:6360 /18:10679
/19:20721 /20:29629 /21:31183 /22:40629 /23:38831 /24:215184
/25:11 /26:22 /27:19 /28:151 /29:150 /30:83
/31:0 /32:138

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

ASN No of nets Total ann. Description
7029 2668 3313 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1868 3389 BellSouth.net Inc.
30036 1324 1389 Mediacom Communications Corp
8402 1230 1534 Corbina telecom
11492 1154 1191 CABLE ONE, INC.
22773 1094 1663 Cox Communications Inc.
6503 1047 1512 Axtel, S.A.B. de C.V.
1785 1044 1936 PaeTec Communications, Inc.
7011 934 1197 Frontier Communications of Am

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

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

1:530 2:669 3:1 4:13 5:128 6:3
8:433 12:1976 13:1 14:624 15:12 16:3
17:5 20:24 23:187 24:1789 27:1319 31:1031
32:51 33:2 34:2 36:8 37:614 38:817
39:1 40:128 41:2887 42:141 44:3 46:1524
47:2 49:431 50:548 52:13 54:14 55:7
56:1 57:41 58:922 59:525 60:242 61:1227
62:927 63:2032 64:4228 65:2233 66:4483 67:2007
68:1155 69:3192 70:981 71:514 72:1873 74:2600
75:478 76:335 77:921 78:907 79:489 80:1220
81:935 82:659 83:525 84:499 85:1148 86:428
87:933 88:357 89:1673 90:301 91:5008 92:581
93:1296 94:1563 95:1214 96:371 97:321 98:889
99:36 100:21 101:253 103:1237 106:115 107:189
108:358 109:1456 110:776 111:932 112:419 113:627
114:645 115:898 116:887 117:708 118:899 119:1162
120:341 121:781 122:1627 123:1150 124:1308 125:1253
128:521 129:180 130:257 131:630 132:289 133:22
134:235 135:61 136:217 137:235 138:334 139:174
140:467 141:244 142:412 143:368 144:472 145:77
146:505 147:283 148:745 149:316 150:144 151:185
152:474 153:176 154:16 155:449 156:221 157:337
158:190 159:547 160:342 161:250 162:379 163:181
164:665 165:409 166:589 167:533 168:910 169:125
170:897 171:146 172:5 173:1724 174:601 175:429
176:557 177:955 178:1601 180:1280 181:104 182:964
183:231 184:540 186:1987 187:1086 188:1362 189:1588
190:6055 192:5972 193:5531 194:4479 195:3224 196:1200
197:168 198:3632 199:4817 200:5851 201:1986 202:8423
203:8570 204:4313 205:2517 206:2714 207:2710 208:4034
209:3611 210:2721 211:1540 212:1979 213:1823 214:868
215:82 216:5072 217:1546 218:544 219:322 220:1216
221:551 222:301 223:336

End of report
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