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, September 6, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Fri 07 Sep, 2012

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

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

BGP routing table entries examined: 416876
Prefixes after maximum aggregation: 175580
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 207077
Total ASes present in the Internet Routing Table: 39012
Prefixes per ASN: 10.69
Origin-only ASes present in the Internet Routing Table: 33599
Origin ASes announcing only one prefix: 15773
Transit ASes present in the Internet Routing Table: 5413
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: 24
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1341
Unregistered ASNs in the Routing Table: 267
Number of 32-bit ASNs allocated by the RIRs: 3223
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 7437
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 171
Number of addresses announced to Internet: 2611006464
Equivalent to 155 /8s, 160 /16s and 204 /24s
Percentage of available address space announced: 70.4
Percentage of allocated address space announced: 70.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.4
Total number of prefixes smaller than registry allocations: 145138

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

Prefixes being announced by APNIC Region ASes: 96803
Total APNIC prefixes after maximum aggregation: 31191
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 97977
Unique aggregates announced from the APNIC address blocks: 42528
APNIC Region origin ASes present in the Internet Routing Table: 4698
APNIC Prefixes per ASN: 20.86
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 727
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: 705530112
Equivalent to 42 /8s, 13 /16s and 137 /24s
Percentage of available APNIC address space announced: 82.5

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: 152614
Total ARIN prefixes after maximum aggregation: 77429
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153588
Unique aggregates announced from the ARIN address blocks: 69007
ARIN Region origin ASes present in the Internet Routing Table: 15163
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5736
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: 1083027456
Equivalent to 64 /8s, 141 /16s and 176 /24s
Percentage of available ARIN address space announced: 57.3

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: 106561
Total RIPE prefixes after maximum aggregation: 56481
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 109013
Unique aggregates announced from the RIPE address blocks: 69821
RIPE Region origin ASes present in the Internet Routing Table: 16835
RIPE Prefixes per ASN: 6.48
RIPE Region origin ASes announcing only one prefix: 8167
RIPE Region transit ASes present in the Internet Routing Table: 2663
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 23
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 644267008
Equivalent to 38 /8s, 102 /16s and 188 /24s
Percentage of available RIPE address space announced: 93.7

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
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: 42846
Total LACNIC prefixes after maximum aggregation: 8216
LACNIC Deaggregation factor: 5.21
Prefixes being announced from the LACNIC address blocks: 45766
Unique aggregates announced from the LACNIC address blocks: 22129
LACNIC Region origin ASes present in the Internet Routing Table: 1614
LACNIC Prefixes per ASN: 28.36
LACNIC Region origin ASes announcing only one prefix: 433
LACNIC Region transit ASes present in the Internet Routing Table: 305
Average LACNIC Region AS path length visible: 4.0
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 113850624
Equivalent to 6 /8s, 201 /16s and 57 /24s
Percentage of available LACNIC address space announced: 67.9

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: 9909
Total AfriNIC prefixes after maximum aggregation: 2206
AfriNIC Deaggregation factor: 4.49
Prefixes being announced from the AfriNIC address blocks: 10360
Unique aggregates announced from the AfriNIC address blocks: 3453
AfriNIC Region origin ASes present in the Internet Routing Table: 557
AfriNIC Prefixes per ASN: 18.60
AfriNIC Region origin ASes announcing only one prefix: 169
AfriNIC Region transit ASes present in the Internet Routing Table: 119
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: 41682176
Equivalent to 2 /8s, 124 /16s and 5 /24s
Percentage of available AfriNIC address space announced: 41.4

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 2342 702 54 PT Telekomunikasi Indonesia
4766 2080 11111 829 Korea Telecom (KIX)
7545 1748 301 88 TPG Internet Pty Ltd
4755 1596 386 160 TATA Communications formerly
9829 1328 1104 36 National Internet Backbone
9583 1179 87 508 Sify Limited
7552 1095 1062 11 Vietel Corporation
24560 1039 386 160 Bharti Airtel Ltd., Telemedia
9498 1003 310 73 BHARTI Airtel Ltd.
4808 971 1952 291 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 3457 990 154 Windstream Communications Inc
6389 3338 3736 185 BellSouth.net Inc.
18566 2086 382 180 Covad Communications Co.
1785 1915 678 127 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications Inc.
20115 1658 1578 614 Charter Communications
4323 1576 1042 384 tw telecom holdings, inc.
30036 1416 278 745 Mediacom Communications Corp
7018 1265 10333 837 AT&T Services, Inc.
11492 1197 217 343 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 1577 544 16 Corbina telecom
12479 830 765 82 France Telecom Espana SA
34984 755 205 178 BILISIM TELEKOM
6830 724 2313 448 UPC Broadband
31148 712 37 9 FreeNet ISP
20940 690 226 549 Akamai Technologies European
13188 689 100 9 Ukraine
2118 685 97 14 EUnet/RELCOM Autonomous Syste
58113 616 69 362 LIR DATACENTER TELECOM SRL
8551 598 364 61 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
28573 2138 1248 54 Types of queries are: POCs, o
10620 2133 362 221 Types of queries are: POCs, o
7303 1564 1034 199 Telecom Argentina S.A.
6503 1527 451 71 Axtel, S.A.B. de C.V.
8151 1425 3013 339 Uninet S.A. de C.V.
6458 791 81 15 Telgua
27947 697 75 89 Telconet S.A
3816 640 262 95 Types of queries are: POCs, o
11172 593 101 69 Alestra, S. de R.L. de C.V.
14420 580 83 105 CORPORACION NACIONAL DE TELEC

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
24863 878 275 36 LINKdotNET AS number
8452 834 958 13 TEDATA
36998 776 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 267 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
33776 231 13 11 Starcomms Nigeria Limited
12258 194 28 66 Vodacom Internet Company
15706 193 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom

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 3457 990 154 Windstream Communications Inc
6389 3338 3736 185 BellSouth.net Inc.
17974 2342 702 54 PT Telekomunikasi Indonesia
28573 2138 1248 54 Types of queries are: POCs, o
10620 2133 362 221 Types of queries are: POCs, o
18566 2086 382 180 Covad Communications Co.
4766 2080 11111 829 Korea Telecom (KIX)
1785 1915 678 127 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications Inc.
7545 1748 301 88 TPG Internet Pty Ltd

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 3338 3153 BellSouth.net Inc.
17974 2342 2288 PT Telekomunikasi Indonesia
28573 2138 2084 Types of queries are: POCs, o
10620 2133 1912 Types of queries are: POCs, o
18566 2086 1906 Covad Communications Co.
1785 1915 1788 PaeTec Communications, Inc.
22773 1885 1756 Cox Communications Inc.
7545 1748 1660 TPG Internet Pty Ltd
8402 1577 1561 Corbina telecom
6503 1527 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
59414 UNALLOCATED 5.102.144.0/21 15576 NTS workspace AG
59395 UNALLOCATED 5.133.16.0/21 12658 Dexterity Networks L
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59521 UNALLOCATED 5.134.192.0/21 29518 Bredband2 AB
59441 UNALLOCATED 5.144.128.0/21 50810 Mobin Net Communicat
59581 UNALLOCATED 5.149.8.0/21 25577 C4L main AS
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.67.0/24 43179 Team Consulting d.o.

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
5.206.192.0/21 39642 Syd Energi Bredbaand A/S
5.207.0.0/16 21497 UMC Autonomous System
14.192.4.0/22 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
41.220.80.0/24 38925 G.I.T. TELECOM LIMITED

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 /8:19 /9:14 /10:30 /11:84 /12:237
/13:473 /14:842 /15:1550 /16:12325 /17:6433 /18:10727
/19:21005 /20:30138 /21:31930 /22:41874 /23:39512 /24:219123
/25:9 /26:11 /27:8 /28:144 /29:163 /30:84
/31:0 /32:141

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

ASN No of nets Total ann. Description
7029 2813 3457 Windstream Communications Inc
18566 2036 2086 Covad Communications Co.
6389 1852 3338 BellSouth.net Inc.
30036 1349 1416 Mediacom Communications Corp
8402 1299 1577 Corbina telecom
22773 1230 1885 Cox Communications Inc.
11492 1160 1197 CABLE ONE, INC.
6503 1049 1527 Axtel, S.A.B. de C.V.
1785 1014 1915 PaeTec Communications, Inc.
7011 933 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)
----------------------------------------------

1:544 2:735 3:1 4:13 5:428 6:3
8:451 12:2006 13:1 14:647 15:11 16:3
17:6 20:27 23:202 24:1820 27:1328 31:1046
32:51 33:2 34:2 36:7 37:757 38:821
39:2 40:133 41:3121 42:158 44:3 46:1527
47:2 49:468 50:587 52:13 54:17 55:7
56:1 57:34 58:940 59:524 60:236 61:1183
62:961 63:2000 64:4258 65:2236 66:4481 67:2050
68:1170 69:3190 70:982 71:523 72:1870 74:2565
75:495 76:323 77:940 78:931 79:486 80:1227
81:952 82:647 83:533 84:517 85:1155 86:485
87:924 88:351 89:1788 90:301 91:5195 92:578
93:1369 94:1635 95:1245 96:415 97:318 98:894
99:36 100:23 101:259 103:1476 105:512 106:118
107:198 108:423 109:1496 110:791 111:955 112:439
113:677 114:654 115:835 116:802 117:728 118:952
119:1216 120:300 121:677 122:1614 123:1162 124:1310
125:1270 128:521 129:178 130:270 131:624 132:295
133:22 134:240 135:61 136:216 137:232 138:342
139:185 140:282 141:279 142:466 143:359 144:485
145:80 146:508 147:267 148:741 149:320 150:151
151:176 152:449 153:182 154:19 155:406 156:219
157:334 158:184 159:562 160:343 161:390 162:407
163:179 164:686 165:407 166:562 167:545 168:957
169:124 170:905 171:149 172:6 173:1720 174:626
175:438 176:568 177:1106 178:1656 180:1356 181:134
182:1021 183:228 184:594 186:2170 187:1247 188:1516
189:1580 190:6068 192:5970 193:5510 194:4238 195:3244
196:1215 197:220 198:3731 199:4917 200:5859 201:1970
202:8496 203:8598 204:4341 205:2519 206:2663 207:2802
208:4049 209:3641 210:2763 211:1524 212:2043 213:1814
214:862 215:87 216:5123 217:1553 218:534 219:299
220:1234 221:512 222:303 223:365

End of report
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