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 21, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 22 Aug, 2012

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

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

BGP routing table entries examined: 414552
Prefixes after maximum aggregation: 175110
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 206070
Total ASes present in the Internet Routing Table: 38940
Prefixes per ASN: 10.65
Origin-only ASes present in the Internet Routing Table: 33519
Origin ASes announcing only one prefix: 15762
Transit ASes present in the Internet Routing Table: 5421
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: 1250
Unregistered ASNs in the Routing Table: 237
Number of 32-bit ASNs allocated by the RIRs: 3143
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 7128
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 197
Number of addresses announced to Internet: 2608935424
Equivalent to 155 /8s, 129 /16s and 50 /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: 144101

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

Prefixes being announced by APNIC Region ASes: 96340
Total APNIC prefixes after maximum aggregation: 31098
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 97512
Unique aggregates announced from the APNIC address blocks: 42406
APNIC Region origin ASes present in the Internet Routing Table: 4688
APNIC Prefixes per ASN: 20.80
APNIC Region origin ASes announcing only one prefix: 1267
APNIC Region transit ASes present in the Internet Routing Table: 737
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: 705513728
Equivalent to 42 /8s, 13 /16s and 73 /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: 152478
Total ARIN prefixes after maximum aggregation: 77376
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153448
Unique aggregates announced from the ARIN address blocks: 68778
ARIN Region origin ASes present in the Internet Routing Table: 15165
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 5757
ARIN Region transit ASes present in the Internet Routing Table: 1531
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: 1084174336
Equivalent to 64 /8s, 159 /16s and 48 /24s
Percentage of available ARIN address space announced: 57.4

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: 105899
Total RIPE prefixes after maximum aggregation: 56080
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 108138
Unique aggregates announced from the RIPE address blocks: 69099
RIPE Region origin ASes present in the Internet Routing Table: 16768
RIPE Prefixes per ASN: 6.45
RIPE Region origin ASes announcing only one prefix: 8138
RIPE Region transit ASes present in the Internet Routing Table: 2659
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: 640778752
Equivalent to 38 /8s, 49 /16s and 130 /24s
Percentage of available RIPE address space announced: 93.2

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: 42355
Total LACNIC prefixes after maximum aggregation: 8303
LACNIC Deaggregation factor: 5.10
Prefixes being announced from the LACNIC address blocks: 45179
Unique aggregates announced from the LACNIC address blocks: 22165
LACNIC Region origin ASes present in the Internet Routing Table: 1613
LACNIC Prefixes per ASN: 28.01
LACNIC Region origin ASes announcing only one prefix: 428
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: 114195456
Equivalent to 6 /8s, 206 /16s and 124 /24s
Percentage of available LACNIC address space announced: 68.1

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: 9625
Total AfriNIC prefixes after maximum aggregation: 2198
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 10077
Unique aggregates announced from the AfriNIC address blocks: 3456
AfriNIC Region origin ASes present in the Internet Routing Table: 556
AfriNIC Prefixes per ASN: 18.12
AfriNIC Region origin ASes announcing only one prefix: 172
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: 41647360
Equivalent to 2 /8s, 123 /16s and 125 /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 2037 11107 795 Korea Telecom (KIX)
7545 1718 301 88 TPG Internet Pty Ltd
4755 1585 385 156 TATA Communications formerly
9829 1318 1100 27 National Internet Backbone
9583 1170 86 509 Sify Limited
7552 1096 1062 11 Vietel Corporation
24560 1039 386 160 Bharti Airtel Ltd., Telemedia
9498 1001 294 75 BHARTI Airtel Ltd.
4808 973 1944 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 3445 990 154 Windstream Communications Inc
6389 3366 3772 195 BellSouth.net Inc.
18566 2088 382 180 Covad Communications Co.
1785 1939 680 129 PaeTec Communications, Inc.
22773 1820 2930 128 Cox Communications Inc.
20115 1647 1573 608 Charter Communications
4323 1570 1042 385 tw telecom holdings, inc.
30036 1401 276 784 Mediacom Communications Corp
7018 1248 10067 816 AT&T Services, Inc.
11492 1195 217 347 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 1509 544 16 Corbina telecom
12479 827 764 85 France Telecom Espana SA
34984 750 189 175 BILISIM TELEKOM
6830 716 2311 447 UPC Broadband
31148 712 37 9 FreeNet ISP
20940 686 225 543 Akamai Technologies European
2118 685 97 14 EUnet/RELCOM Autonomous Syste
13188 657 100 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
10620 2093 356 215 Types of queries are: POCs, o
28573 2019 1244 60 Types of queries are: POCs, o
7303 1564 1033 201 Telecom Argentina S.A.
6503 1490 435 70 Axtel, S.A.B. de C.V.
8151 1335 3014 343 Uninet S.A. de C.V.
6458 883 81 15 Telgua
27947 691 75 90 Telconet S.A
3816 604 255 90 Types of queries are: POCs, o
11172 592 101 71 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 894 958 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
12258 194 28 66 Vodacom Internet Company
33776 194 13 11 Starcomms Nigeria Limited
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 3445 990 154 Windstream Communications Inc
6389 3366 3772 195 BellSouth.net Inc.
17974 2342 702 54 PT Telekomunikasi Indonesia
10620 2093 356 215 Types of queries are: POCs, o
18566 2088 382 180 Covad Communications Co.
4766 2037 11107 795 Korea Telecom (KIX)
28573 2019 1244 60 Types of queries are: POCs, o
1785 1939 680 129 PaeTec Communications, Inc.
22773 1820 2930 128 Cox Communications Inc.
7545 1718 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 3366 3171 BellSouth.net Inc.
17974 2342 2288 PT Telekomunikasi Indonesia
28573 2019 1959 Types of queries are: POCs, o
18566 2088 1908 Covad Communications Co.
10620 2093 1878 Types of queries are: POCs, o
1785 1939 1810 PaeTec Communications, Inc.
22773 1820 1692 Cox Communications Inc.
7545 1718 1630 TPG Internet Pty Ltd
8402 1509 1493 Corbina telecom
4755 1585 1429 TATA Communications formerly

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
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.
59457 UNALLOCATED 5.149.68.0/24 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
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
31.169.48.0/21 50304 Blix Solutions AS

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 /9:14 /10:30 /11:84 /12:236
/13:473 /14:842 /15:1542 /16:12331 /17:6423 /18:10728
/19:20872 /20:29966 /21:31552 /22:41402 /23:39368 /24:218087
/25:11 /26:22 /27:18 /28:147 /29:161 /30:83
/31:0 /32:140

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

ASN No of nets Total ann. Description
7029 2805 3445 Windstream Communications Inc
18566 2038 2088 Covad Communications Co.
6389 1856 3366 BellSouth.net Inc.
30036 1336 1401 Mediacom Communications Corp
8402 1242 1509 Corbina telecom
22773 1170 1820 Cox Communications Inc.
11492 1158 1195 CABLE ONE, INC.
1785 1041 1939 PaeTec Communications, Inc.
6503 1041 1490 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)
----------------------------------------------

1:523 2:738 3:1 4:13 5:367 6:3
8:438 12:1971 13:1 14:635 15:11 16:3
17:6 20:27 23:200 24:1799 27:1332 31:1052
32:51 33:2 34:2 36:8 37:732 38:816
39:1 40:133 41:2855 42:155 44:3 46:1586
47:2 49:435 50:581 52:13 54:16 55:6
56:1 57:38 58:928 59:515 60:234 61:1173
62:951 63:2003 64:4254 65:2241 66:4530 67:2054
68:1156 69:3200 70:987 71:522 72:1864 74:2609
75:491 76:330 77:940 78:896 79:493 80:1229
81:955 82:645 83:535 84:512 85:1123 86:462
87:942 88:350 89:1809 90:299 91:5116 92:585
93:1347 94:1587 95:1256 96:411 97:317 98:900
99:36 100:22 101:259 103:1397 105:512 106:114
107:194 108:412 109:1501 110:797 111:952 112:428
113:682 114:651 115:827 116:864 117:721 118:940
119:1220 120:294 121:678 122:1612 123:1171 124:1313
125:1265 128:486 129:178 130:263 131:586 132:294
133:22 134:235 135:61 136:217 137:236 138:339
139:183 140:473 141:275 142:465 143:356 144:484
145:79 146:503 147:257 148:755 149:299 150:148
151:168 152:455 153:175 154:19 155:425 156:221
157:337 158:179 159:559 160:348 161:387 162:400
163:178 164:678 165:409 166:561 167:541 168:952
169:124 170:907 171:145 172:5 173:1723 174:632
175:431 176:599 177:1025 178:1686 180:1341 181:125
182:1026 183:220 184:577 186:2097 187:1123 188:1467
189:1567 190:6148 192:5960 193:5461 194:4230 195:3232
196:1232 197:207 198:3673 199:4875 200:5922 201:1956
202:8484 203:8564 204:4329 205:2515 206:2726 207:2785
208:4039 209:3618 210:2721 211:1534 212:2032 213:1803
214:869 215:82 216:5121 217:1546 218:533 219:299
220:1236 221:510 222:301 223:369

End of report
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