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.

Tuesday, August 7, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 08 Aug, 2012

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

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

BGP routing table entries examined: 413470
Prefixes after maximum aggregation: 174773
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 204538
Total ASes present in the Internet Routing Table: 38819
Prefixes per ASN: 10.65
Origin-only ASes present in the Internet Routing Table: 33422
Origin ASes announcing only one prefix: 15728
Transit ASes present in the Internet Routing Table: 5397
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: 25
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1084
Unregistered ASNs in the Routing Table: 199
Number of 32-bit ASNs allocated by the RIRs: 3075
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6939
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 178
Number of addresses announced to Internet: 2602879488
Equivalent to 155 /8s, 36 /16s and 202 /24s
Percentage of available address space announced: 70.2
Percentage of allocated address space announced: 70.3
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 143533

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

Prefixes being announced by APNIC Region ASes: 95661
Total APNIC prefixes after maximum aggregation: 31056
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 96776
Unique aggregates announced from the APNIC address blocks: 41723
APNIC Region origin ASes present in the Internet Routing Table: 4635
APNIC Prefixes per ASN: 20.88
APNIC Region origin ASes announcing only one prefix: 1263
APNIC Region transit ASes present in the Internet Routing Table: 713
Average APNIC Region AS path length visible: 4.0
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 0
Number of APNIC addresses announced to Internet: 704320256
Equivalent to 41 /8s, 251 /16s and 19 /24s
Percentage of available APNIC address space announced: 82.3

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: 152110
Total ARIN prefixes after maximum aggregation: 77370
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153106
Unique aggregates announced from the ARIN address blocks: 68693
ARIN Region origin ASes present in the Internet Routing Table: 15151
ARIN Prefixes per ASN: 10.11
ARIN Region origin ASes announcing only one prefix: 5759
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: 18
Number of ARIN region 32-bit ASNs visible in the Routing Table: 0
Number of ARIN addresses announced to Internet: 1083499264
Equivalent to 64 /8s, 148 /16s and 227 /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: 106174
Total RIPE prefixes after maximum aggregation: 55830
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 108346
Unique aggregates announced from the RIPE address blocks: 68593
RIPE Region origin ASes present in the Internet Routing Table: 16717
RIPE Prefixes per ASN: 6.48
RIPE Region origin ASes announcing only one prefix: 8105
RIPE Region transit ASes present in the Internet Routing Table: 2666
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: 638281728
Equivalent to 38 /8s, 11 /16s and 104 /24s
Percentage of available RIPE address space announced: 92.8

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: 42243
Total LACNIC prefixes after maximum aggregation: 8271
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 45002
Unique aggregates announced from the LACNIC address blocks: 21943
LACNIC Region origin ASes present in the Internet Routing Table: 1610
LACNIC Prefixes per ASN: 27.95
LACNIC Region origin ASes announcing only one prefix: 429
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: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 0
Number of LACNIC addresses announced to Internet: 112590592
Equivalent to 6 /8s, 181 /16s and 255 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9609
Total AfriNIC prefixes after maximum aggregation: 2192
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 10061
Unique aggregates announced from the AfriNIC address blocks: 3437
AfriNIC Region origin ASes present in the Internet Routing Table: 557
AfriNIC Prefixes per ASN: 18.06
AfriNIC Region origin ASes announcing only one prefix: 172
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: 41577984
Equivalent to 2 /8s, 122 /16s and 110 /24s
Percentage of available AfriNIC address space announced: 41.3

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 2312 702 54 PT Telekomunikasi Indonesia
4766 2025 11112 784 Korea Telecom (KIX)
7545 1695 301 87 TPG Internet Pty Ltd
4755 1583 385 156 TATA Communications formerly
9829 1310 1084 31 National Internet Backbone
9583 1205 90 533 Sify Limited
7552 1110 1062 11 Vietel Corporation
24560 1038 385 165 Bharti Airtel Ltd., Telemedia
9498 996 294 74 BHARTI Airtel Ltd.
4808 965 1941 289 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 3445 986 155 Windstream Communications Inc
6389 3343 3773 192 BellSouth.net Inc.
18566 2089 382 181 Covad Communications Co.
1785 1947 681 133 PaeTec Communications, Inc.
22773 1695 2914 125 Cox Communications Inc.
20115 1646 1572 611 Charter Communications
4323 1575 1043 384 tw telecom holdings, inc.
30036 1424 277 782 Mediacom Communications Corp
7018 1251 10072 820 AT&T Services, Inc.
11492 1191 216 351 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 1516 544 16 Corbina telecom
2118 1433 97 14 EUnet/RELCOM Autonomous Syste
12479 823 761 88 France Telecom Espana SA
34984 736 189 177 BILISIM TELEKOM
6830 715 2310 446 UPC Broadband
20940 705 235 560 Akamai Technologies European
31148 704 37 9 FreeNet ISP
13188 647 100 9 Ukraine
58113 627 70 373 LIR DATACENTER TELECOM SRL
8551 602 364 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
10620 2051 350 212 Types of queries are: POCs, o
28573 2041 1232 57 Types of queries are: POCs, o
6503 1520 419 69 Axtel, S.A.B. de C.V.
7303 1463 936 199 Telecom Argentina S.A.
8151 1289 2958 367 Uninet S.A. de C.V.
6458 883 81 15 Telgua
27947 690 75 90 Telconet S.A
11172 645 107 75 Alestra, S. de R.L. de C.V.
3816 599 253 99 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 940 958 13 TEDATA
24863 865 274 33 LINKdotNET AS number
36998 532 48 3 MOBITEL
6713 515 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 263 905 224 The Internet Solution
33776 216 12 17 Starcomms Nigeria Limited
12258 195 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
15706 180 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 3445 986 155 Windstream Communications Inc
6389 3343 3773 192 BellSouth.net Inc.
17974 2312 702 54 PT Telekomunikasi Indonesia
18566 2089 382 181 Covad Communications Co.
10620 2051 350 212 Types of queries are: POCs, o
28573 2041 1232 57 Types of queries are: POCs, o
4766 2025 11112 784 Korea Telecom (KIX)
1785 1947 681 133 PaeTec Communications, Inc.
7545 1695 301 87 TPG Internet Pty Ltd
22773 1695 2914 125 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 3343 3151 BellSouth.net Inc.
17974 2312 2258 PT Telekomunikasi Indonesia
28573 2041 1984 Types of queries are: POCs, o
18566 2089 1908 Covad Communications Co.
10620 2051 1839 Types of queries are: POCs, o
1785 1947 1814 PaeTec Communications, Inc.
7545 1695 1608 TPG Internet Pty Ltd
22773 1695 1570 Cox Communications Inc.
8402 1516 1500 Corbina telecom
6503 1520 1451 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
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.64.0/19 43179 Team Consulting d.o.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.67.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.71.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.74.0/23 35567 DASTO semtel d.o.o.
59458 UNALLOCATED 5.149.96.0/21 50597 ScopeSky Communicati

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
5.178.64.0/21 50673 Serverius AS
5.178.120.0/21 5602 KPNQwest Italia S.p.a
5.178.128.0/18 28751 Caucasus Online LLC
5.178.128.0/17 20771 CCS Autonomous System
5.178.192.0/18 28751 Caucasus Online LLC
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

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 /9:13 /10:29 /11:83 /12:236
/13:472 /14:847 /15:1525 /16:12305 /17:6382 /18:10650
/19:20772 /20:29860 /21:31504 /22:41191 /23:39323 /24:217676
/25:11 /26:22 /27:18 /28:146 /29:160 /30:84
/31:0 /32:141

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

ASN No of nets Total ann. Description
7029 2805 3445 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1834 3343 BellSouth.net Inc.
30036 1360 1424 Mediacom Communications Corp
8402 1214 1516 Corbina telecom
11492 1154 1191 CABLE ONE, INC.
22773 1119 1695 Cox Communications Inc.
1785 1053 1947 PaeTec Communications, Inc.
6503 1047 1520 Axtel, S.A.B. de C.V.
7011 929 1190 Frontier Communications of Am

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

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

1:502 2:673 3:1 4:13 5:334 6:3
8:436 12:1968 13:1 14:625 15:11 16:3
17:6 20:24 23:201 24:1794 27:1298 31:1046
32:51 33:2 34:2 36:8 37:693 38:818
39:1 40:134 41:2842 42:154 44:3 46:1561
47:2 49:426 50:575 52:13 54:14 55:6
56:1 57:38 58:927 59:508 60:232 61:1175
62:932 63:2022 64:4237 65:2243 66:4525 67:2040
68:1151 69:3200 70:987 71:520 72:1866 74:2608
75:489 76:331 77:942 78:954 79:493 80:1239
81:953 82:650 83:541 84:511 85:1145 86:472
87:934 88:352 89:1806 90:303 91:5085 92:586
93:1327 94:1582 95:1268 96:401 97:317 98:891
99:36 100:22 101:252 103:1290 105:512 106:112
107:189 108:397 109:1484 110:786 111:937 112:429
113:658 114:634 115:832 116:879 117:709 118:938
119:1146 120:341 121:673 122:1591 123:1165 124:1308
125:1263 128:521 129:177 130:256 131:635 132:281
133:22 134:234 135:61 136:214 137:238 138:347
139:181 140:469 141:260 142:432 143:375 144:497
145:76 146:503 147:285 148:750 149:318 150:146
151:186 152:453 153:175 154:18 155:421 156:219
157:336 158:189 159:553 160:347 161:377 162:383
163:176 164:672 165:408 166:579 167:531 168:960
169:125 170:907 171:148 172:5 173:1729 174:632
175:408 176:567 177:999 178:1658 180:1314 181:116
182:1019 183:231 184:572 186:2054 187:1129 188:1409
189:1586 190:6130 192:5973 193:5678 194:4540 195:3438
196:1234 197:198 198:3655 199:4842 200:5920 201:1974
202:8255 203:8490 204:4308 205:2505 206:2723 207:2726
208:4040 209:3611 210:2699 211:1540 212:2019 213:1811
214:869 215:85 216:5092 217:1554 218:547 219:298
220:1233 221:552 222:298 223:359

End of report
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