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.

Friday, September 7, 2012

[bgp-stats] Routing Table Report - London view

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

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

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

BGP routing table entries examined: 417632
Prefixes after maximum aggregation: 175795
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 207305
Total ASes present in the Internet Routing Table: 39018
Prefixes per ASN: 10.70
Origin-only ASes present in the Internet Routing Table: 33598
Origin ASes announcing only one prefix: 15791
Transit ASes present in the Internet Routing Table: 5420
Transit-only ASes present in the Internet Routing Table: 114
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: 1348
Unregistered ASNs in the Routing Table: 273
Number of 32-bit ASNs allocated by the RIRs: 3235
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 7466
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 182
Number of addresses announced to Internet: 2612738048
Equivalent to 155 /8s, 187 /16s and 56 /24s
Percentage of available address space announced: 70.6
Percentage of allocated address space announced: 70.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.5
Total number of prefixes smaller than registry allocations: 144990

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

Prefixes being announced by APNIC Region ASes: 96581
Total APNIC prefixes after maximum aggregation: 31172
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 97754
Unique aggregates announced from the APNIC address blocks: 42514
APNIC Region origin ASes present in the Internet Routing Table: 4683
APNIC Prefixes per ASN: 20.87
APNIC Region origin ASes announcing only one prefix: 1269
APNIC Region transit ASes present in the Internet Routing Table: 721
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: 705321984
Equivalent to 42 /8s, 10 /16s and 92 /24s
Percentage of available APNIC address space announced: 82.4

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: 152905
Total ARIN prefixes after maximum aggregation: 77491
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153869
Unique aggregates announced from the ARIN address blocks: 68998
ARIN Region origin ASes present in the Internet Routing Table: 15169
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5738
ARIN Region transit ASes present in the Internet Routing Table: 1524
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: 1083248640
Equivalent to 64 /8s, 145 /16s and 16 /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: 107159
Total RIPE prefixes after maximum aggregation: 56536
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109577
Unique aggregates announced from the RIPE address blocks: 69872
RIPE Region origin ASes present in the Internet Routing Table: 16836
RIPE Prefixes per ASN: 6.51
RIPE Region origin ASes announcing only one prefix: 8170
RIPE Region transit ASes present in the Internet Routing Table: 2670
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 24
Number of RIPE region 32-bit ASNs visible in the Routing Table: 0
Number of RIPE addresses announced to Internet: 644440576
Equivalent to 38 /8s, 105 /16s and 98 /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: 42972
Total LACNIC prefixes after maximum aggregation: 8345
LACNIC Deaggregation factor: 5.15
Prefixes being announced from the LACNIC address blocks: 45930
Unique aggregates announced from the LACNIC address blocks: 22316
LACNIC Region origin ASes present in the Internet Routing Table: 1629
LACNIC Prefixes per ASN: 28.20
LACNIC Region origin ASes announcing only one prefix: 443
LACNIC Region transit ASes present in the Internet Routing Table: 310
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: 115319552
Equivalent to 6 /8s, 223 /16s and 163 /24s
Percentage of available LACNIC address space announced: 68.7

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: 9843
Total AfriNIC prefixes after maximum aggregation: 2194
AfriNIC Deaggregation factor: 4.49
Prefixes being announced from the AfriNIC address blocks: 10319
Unique aggregates announced from the AfriNIC address blocks: 3455
AfriNIC Region origin ASes present in the Internet Routing Table: 554
AfriNIC Prefixes per ASN: 18.63
AfriNIC Region origin ASes announcing only one prefix: 171
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: 41654272
Equivalent to 2 /8s, 123 /16s and 152 /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 1747 301 87 TPG Internet Pty Ltd
4755 1596 386 160 TATA Communications formerly
9829 1321 1101 31 National Internet Backbone
9583 1179 87 508 Sify Limited
7552 1109 1062 11 Vietel Corporation
24560 1039 386 160 Bharti Airtel Ltd., Telemedia
9498 1002 310 73 BHARTI Airtel Ltd.
4808 975 1945 292 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 3334 3736 184 BellSouth.net Inc.
18566 2086 382 180 Covad Communications Co.
1785 1915 678 127 PaeTec Communications, Inc.
22773 1887 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 1259 10333 835 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 1590 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
12479 830 765 82 France Telecom Espana SA
34984 756 205 178 BILISIM TELEKOM
6830 724 2313 448 UPC Broadband
31148 713 37 9 FreeNet ISP
20940 696 228 551 Akamai Technologies European
13188 688 100 9 Ukraine
58113 616 69 362 LIR DATACENTER TELECOM SRL
8551 597 364 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 2140 1248 54 Types of queries are: POCs, o
10620 2133 362 222 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 1424 3009 346 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 269 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 3334 3736 184 BellSouth.net Inc.
17974 2342 702 54 PT Telekomunikasi Indonesia
28573 2140 1248 54 Types of queries are: POCs, o
10620 2133 362 222 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 1887 2931 129 Cox Communications Inc.
7545 1747 301 87 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 3334 3150 BellSouth.net Inc.
17974 2342 2288 PT Telekomunikasi Indonesia
28573 2140 2086 Types of queries are: POCs, o
10620 2133 1911 Types of queries are: POCs, o
18566 2086 1906 Covad Communications Co.
1785 1915 1788 PaeTec Communications, Inc.
22773 1887 1758 Cox Communications Inc.
7545 1747 1660 TPG Internet Pty Ltd
8402 1590 1574 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
5.206.240.0/20 57332 TOM-NET s.c. Dariusz Koper, R
5.226.64.0/18 12741 Netia SA
5.226.136.0/21 25369 4u servers
5.228.0.0/16 42610 RIPE Network Coordination Cen
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

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
/13:474 /14:842 /15:1551 /16:12344 /17:6440 /18:10749
/19:21021 /20:30193 /21:31972 /22:41876 /23:39491 /24:219735
/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 1849 3334 BellSouth.net Inc.
30036 1349 1416 Mediacom Communications Corp
8402 1313 1590 Corbina telecom
22773 1230 1887 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)
----------------------------------------------

1:546 2:745 3:1 4:13 5:428 6:3
8:453 12:2000 13:1 14:650 15:11 16:3
17:6 20:27 23:202 24:1816 27:1311 31:914
32:51 33:2 34:2 36:7 37:757 38:821
39:2 40:133 41:3119 42:158 44:3 46:1527
47:2 49:467 50:587 52:13 54:17 55:6
56:1 57:36 58:931 59:524 60:236 61:1188
62:914 63:1998 64:4261 65:2237 66:4490 67:2051
68:1168 69:3193 70:984 71:522 72:1871 74:2569
75:495 76:323 77:945 78:935 79:486 80:1225
81:954 82:641 83:532 84:517 85:1156 86:485
87:925 88:351 89:1789 90:301 91:5201 92:578
93:1356 94:1621 95:1248 96:416 97:318 98:893
99:36 100:23 101:254 103:1457 105:512 106:118
107:198 108:426 109:1500 110:785 111:953 112:439
113:678 114:644 115:843 116:795 117:727 118:919
119:1208 120:299 121:675 122:1602 123:1170 124:1313
125:1271 128:516 129:178 130:270 131:623 132:304
133:22 134:240 135:61 136:215 137:235 138:342
139:185 140:475 141:279 142:467 143:361 144:481
145:80 146:507 147:265 148:742 149:322 150:150
151:178 152:449 153:182 154:19 155:408 156:219
157:334 158:184 159:563 160:343 161:389 162:407
163:179 164:684 165:411 166:560 167:545 168:956
169:124 170:905 171:149 172:6 173:1720 174:629
175:430 176:569 177:1100 178:1661 180:1353 181:134
182:1021 183:231 184:596 186:2188 187:1243 188:1529
189:1581 190:6077 192:5977 193:5725 194:4558 195:3428
196:1204 197:222 198:3727 199:4924 200:5891 201:1957
202:8406 203:8557 204:4343 205:2524 206:2662 207:2802
208:4047 209:3649 210:2760 211:1530 212:2038 213:1807
214:889 215:87 216:5127 217:1557 218:534 219:299
220:1233 221:512 222:303 223:366

End of report
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