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 14, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 15 Aug, 2012

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

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

BGP routing table entries examined: 414267
Prefixes after maximum aggregation: 175231
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 204044
Total ASes present in the Internet Routing Table: 38906
Prefixes per ASN: 10.65
Origin-only ASes present in the Internet Routing Table: 33498
Origin ASes announcing only one prefix: 15741
Transit ASes present in the Internet Routing Table: 5408
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: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1136
Unregistered ASNs in the Routing Table: 206
Number of 32-bit ASNs allocated by the RIRs: 3112
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 6977
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 179
Number of addresses announced to Internet: 2609788160
Equivalent to 155 /8s, 142 /16s and 53 /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: 93.2
Total number of prefixes smaller than registry allocations: 143830

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

Prefixes being announced by APNIC Region ASes: 96503
Total APNIC prefixes after maximum aggregation: 31272
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 97670
Unique aggregates announced from the APNIC address blocks: 42245
APNIC Region origin ASes present in the Internet Routing Table: 4685
APNIC Prefixes per ASN: 20.85
APNIC Region origin ASes announcing only one prefix: 1268
APNIC Region transit ASes present in the Internet Routing Table: 734
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: 706040832
Equivalent to 42 /8s, 21 /16s and 84 /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: 152375
Total ARIN prefixes after maximum aggregation: 77410
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153353
Unique aggregates announced from the ARIN address blocks: 68684
ARIN Region origin ASes present in the Internet Routing Table: 15158
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 5745
ARIN Region transit ASes present in the Internet Routing Table: 1529
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: 1083863808
Equivalent to 64 /8s, 154 /16s and 115 /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: 105739
Total RIPE prefixes after maximum aggregation: 55958
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 107994
Unique aggregates announced from the RIPE address blocks: 67524
RIPE Region origin ASes present in the Internet Routing Table: 16743
RIPE Prefixes per ASN: 6.45
RIPE Region origin ASes announcing only one prefix: 8122
RIPE Region transit ASes present in the Internet Routing Table: 2654
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: 641891840
Equivalent to 38 /8s, 66 /16s and 126 /24s
Percentage of available RIPE address space announced: 93.3

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: 42237
Total LACNIC prefixes after maximum aggregation: 8291
LACNIC Deaggregation factor: 5.09
Prefixes being announced from the LACNIC address blocks: 44968
Unique aggregates announced from the LACNIC address blocks: 22023
LACNIC Region origin ASes present in the Internet Routing Table: 1610
LACNIC Prefixes per ASN: 27.93
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: 113641984
Equivalent to 6 /8s, 198 /16s and 10 /24s
Percentage of available LACNIC address space announced: 67.7

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: 9650
Total AfriNIC prefixes after maximum aggregation: 2200
AfriNIC Deaggregation factor: 4.39
Prefixes being announced from the AfriNIC address blocks: 10102
Unique aggregates announced from the AfriNIC address blocks: 3416
AfriNIC Region origin ASes present in the Internet Routing Table: 559
AfriNIC Prefixes per ASN: 18.07
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 41661696
Equivalent to 2 /8s, 123 /16s and 181 /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 2020 11106 779 Korea Telecom (KIX)
7545 1708 301 86 TPG Internet Pty Ltd
4755 1584 385 156 TATA Communications formerly
9829 1311 1084 31 National Internet Backbone
9583 1206 90 534 Sify Limited
7552 1092 1062 11 Vietel Corporation
24560 1037 385 169 Bharti Airtel Ltd., Telemedia
9498 997 294 74 BHARTI Airtel Ltd.
4808 967 1940 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 3441 990 154 Windstream Communications Inc
6389 3375 3773 193 BellSouth.net Inc.
18566 2089 382 180 Covad Communications Co.
1785 1940 680 130 PaeTec Communications, Inc.
22773 1722 2914 127 Cox Communications Inc.
20115 1646 1572 611 Charter Communications
4323 1571 1042 385 tw telecom holdings, inc.
30036 1447 284 776 Mediacom Communications Corp
7018 1245 10055 815 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 1459 544 16 Corbina telecom
12479 826 764 85 France Telecom Espana SA
34984 747 189 175 BILISIM TELEKOM
6830 716 2311 447 UPC Broadband
31148 702 37 9 FreeNet ISP
20940 694 229 549 Akamai Technologies European
2118 685 97 14 EUnet/RELCOM Autonomous Syste
13188 656 100 9 Ukraine
58113 624 70 370 LIR DATACENTER TELECOM SRL
8551 600 364 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 2077 353 220 Types of queries are: POCs, o
28573 2036 1238 57 Types of queries are: POCs, o
7303 1561 1032 201 Telecom Argentina S.A.
6503 1520 419 69 Axtel, S.A.B. de C.V.
8151 1324 3010 336 Uninet S.A. de C.V.
6458 882 81 15 Telgua
27947 691 75 90 Telconet S.A
3816 601 254 92 Types of queries are: POCs, o
11172 591 101 70 Alestra, S. de R.L. de C.V.
22047 580 326 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 901 958 13 TEDATA
24863 869 275 36 LINKdotNET AS number
36998 532 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
33776 227 12 19 Starcomms Nigeria Limited
12258 195 28 62 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 3441 990 154 Windstream Communications Inc
6389 3375 3773 193 BellSouth.net Inc.
17974 2342 702 54 PT Telekomunikasi Indonesia
18566 2089 382 180 Covad Communications Co.
10620 2077 353 220 Types of queries are: POCs, o
28573 2036 1238 57 Types of queries are: POCs, o
4766 2020 11106 779 Korea Telecom (KIX)
1785 1940 680 130 PaeTec Communications, Inc.
22773 1722 2914 127 Cox Communications Inc.
7545 1708 301 86 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 3375 3182 BellSouth.net Inc.
17974 2342 2288 PT Telekomunikasi Indonesia
28573 2036 1979 Types of queries are: POCs, o
18566 2089 1909 Covad Communications Co.
10620 2077 1857 Types of queries are: POCs, o
1785 1940 1810 PaeTec Communications, Inc.
7545 1708 1622 TPG Internet Pty Ltd
22773 1722 1595 Cox Communications Inc.
6503 1520 1451 Axtel, S.A.B. de C.V.
8402 1459 1443 Corbina telecom

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 5.149.65.0/24 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.
59457 UNALLOCATED 5.149.68.0/24 43179 Team Consulting d.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.

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
5.191.0.0/16 31721 Azercell Telecom AS
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

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 /8:21 /9:14 /10:30 /11:84 /12:237
/13:472 /14:848 /15:1530 /16:12328 /17:6400 /18:10669
/19:20833 /20:30016 /21:31562 /22:41396 /23:39417 /24:217824
/25:11 /26:22 /27:18 /28:148 /29:159 /30:85
/31:0 /32:143

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

ASN No of nets Total ann. Description
7029 2801 3441 Windstream Communications Inc
18566 2039 2089 Covad Communications Co.
6389 1860 3375 BellSouth.net Inc.
30036 1382 1447 Mediacom Communications Corp
8402 1188 1459 Corbina telecom
11492 1154 1191 CABLE ONE, INC.
22773 1130 1722 Cox Communications Inc.
6503 1047 1520 Axtel, S.A.B. de C.V.
1785 1041 1940 PaeTec Communications, Inc.
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)
----------------------------------------------

1:507 2:703 3:1 4:13 5:353 6:3
8:435 12:1977 13:1 14:626 15:11 16:3
17:6 20:26 23:199 24:1796 27:1330 31:1046
32:51 33:2 34:2 36:7 37:727 38:813
39:1 40:134 41:2880 42:156 44:3 46:1584
47:2 49:435 50:578 52:13 54:14 55:4
56:1 57:35 58:926 59:514 60:234 61:1178
62:951 63:2015 64:4230 65:2248 66:4529 67:2054
68:1158 69:3209 70:988 71:519 72:1869 74:2606
75:489 76:330 77:949 78:908 79:497 80:1237
81:954 82:640 83:541 84:512 85:1135 86:478
87:935 88:336 89:1813 90:303 91:5110 92:591
93:1333 94:1580 95:1244 96:411 97:317 98:897
99:36 100:22 101:255 103:1383 105:512 106:112
107:193 108:406 109:1496 110:789 111:948 112:428
113:670 114:652 115:833 116:869 117:723 118:943
119:1204 120:353 121:682 122:1615 123:1167 124:1311
125:1265 128:490 129:179 130:256 131:629 132:293
133:22 134:235 135:61 136:216 137:236 138:341
139:182 140:472 141:265 142:433 143:367 144:490
145:78 146:505 147:253 148:750 149:319 150:147
151:186 152:455 153:175 154:19 155:412 156:219
157:336 158:189 159:558 160:346 161:387 162:400
163:178 164:677 165:387 166:574 167:533 168:949
169:125 170:908 171:145 172:5 173:1739 174:627
175:424 176:592 177:981 178:1680 180:1336 181:117
182:1023 183:233 184:577 186:2058 187:1109 188:1448
189:1557 190:6109 192:5963 193:5454 194:4236 195:3239
196:1234 197:204 198:3660 199:4868 200:5915 201:1955
202:8483 203:8570 204:4318 205:2520 206:2726 207:2719
208:4040 209:3616 210:2713 211:1559 212:2024 213:1805
214:878 215:86 216:5091 217:1546 218:551 219:298
220:1234 221:553 222:300 223:361

End of report
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