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.

Sunday, September 2, 2012

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 03 Sep, 2012

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

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

BGP routing table entries examined: 416807
Prefixes after maximum aggregation: 175578
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 206962
Total ASes present in the Internet Routing Table: 38990
Prefixes per ASN: 10.69
Origin-only ASes present in the Internet Routing Table: 33572
Origin ASes announcing only one prefix: 15778
Transit ASes present in the Internet Routing Table: 5418
Transit-only ASes present in the Internet Routing Table: 118
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: 1310
Unregistered ASNs in the Routing Table: 252
Number of 32-bit ASNs allocated by the RIRs: 3206
Number of 32-bit ASNs visible in the Routing Table: 0
Prefixes from 32-bit ASNs in the Routing Table: 7385
Special use prefixes present in the Routing Table: 6
Prefixes being announced from unallocated address space: 167
Number of addresses announced to Internet: 2610773504
Equivalent to 155 /8s, 157 /16s and 62 /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: 145177

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

Prefixes being announced by APNIC Region ASes: 96685
Total APNIC prefixes after maximum aggregation: 31120
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 97881
Unique aggregates announced from the APNIC address blocks: 42551
APNIC Region origin ASes present in the Internet Routing Table: 4690
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: 731
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: 705419776
Equivalent to 42 /8s, 11 /16s and 218 /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: 152717
Total ARIN prefixes after maximum aggregation: 77475
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153698
Unique aggregates announced from the ARIN address blocks: 68975
ARIN Region origin ASes present in the Internet Routing Table: 15165
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5742
ARIN Region transit ASes present in the Internet Routing Table: 1522
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: 1083746816
Equivalent to 64 /8s, 152 /16s and 170 /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: 106645
Total RIPE prefixes after maximum aggregation: 56378
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 109017
Unique aggregates announced from the RIPE address blocks: 69713
RIPE Region origin ASes present in the Internet Routing Table: 16810
RIPE Prefixes per ASN: 6.49
RIPE Region origin ASes announcing only one prefix: 8165
RIPE Region transit ASes present in the Internet Routing Table: 2664
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: 642572544
Equivalent to 38 /8s, 76 /16s and 225 /24s
Percentage of available RIPE address space announced: 93.4

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: 42835
Total LACNIC prefixes after maximum aggregation: 8350
LACNIC Deaggregation factor: 5.13
Prefixes being announced from the LACNIC address blocks: 45743
Unique aggregates announced from the LACNIC address blocks: 22133
LACNIC Region origin ASes present in the Internet Routing Table: 1620
LACNIC Prefixes per ASN: 28.24
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 305
Average LACNIC Region AS path length visible: 4.1
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: 114859520
Equivalent to 6 /8s, 216 /16s and 158 /24s
Percentage of available LACNIC address space announced: 68.5

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: 9815
Total AfriNIC prefixes after maximum aggregation: 2198
AfriNIC Deaggregation factor: 4.47
Prefixes being announced from the AfriNIC address blocks: 10300
Unique aggregates announced from the AfriNIC address blocks: 3455
AfriNIC Region origin ASes present in the Internet Routing Table: 554
AfriNIC Prefixes per ASN: 18.59
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 118
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: 41595136
Equivalent to 2 /8s, 122 /16s and 177 /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 2341 702 54 PT Telekomunikasi Indonesia
4766 2081 11111 830 Korea Telecom (KIX)
7545 1745 301 88 TPG Internet Pty Ltd
4755 1591 385 158 TATA Communications formerly
9829 1312 1100 27 National Internet Backbone
9583 1177 87 507 Sify Limited
7552 1095 1062 11 Vietel Corporation
24560 1039 386 160 Bharti Airtel Ltd., Telemedia
9498 1002 310 73 BHARTI Airtel Ltd.
4808 976 1969 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 3454 990 154 Windstream Communications Inc
6389 3341 3737 185 BellSouth.net Inc.
18566 2087 382 179 Covad Communications Co.
1785 1949 681 133 PaeTec Communications, Inc.
22773 1867 2930 128 Cox Communications Inc.
20115 1655 1575 614 Charter Communications
4323 1574 1042 385 tw telecom holdings, inc.
30036 1439 282 722 Mediacom Communications Corp
7018 1263 10333 835 AT&T Services, Inc.
11492 1196 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 1580 544 16 Corbina telecom
12479 831 766 80 France Telecom Espana SA
34984 752 189 176 BILISIM TELEKOM
6830 724 2313 448 UPC Broadband
2118 715 97 14 EUnet/RELCOM Autonomous Syste
31148 710 37 9 FreeNet ISP
20940 685 223 545 Akamai Technologies European
13188 669 100 9 Ukraine
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
10620 2126 362 226 Types of queries are: POCs, o
28573 2124 1248 54 Types of queries are: POCs, o
7303 1564 1034 199 Telecom Argentina S.A.
6503 1525 451 71 Axtel, S.A.B. de C.V.
8151 1427 3014 344 Uninet S.A. de C.V.
6458 834 81 15 Telgua
27947 696 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.
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
24863 869 275 36 LINKdotNET AS number
8452 843 958 13 TEDATA
36998 777 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 267 80 8 RAYA Telecom - Egypt
3741 261 904 222 The Internet Solution
33776 217 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 3454 990 154 Windstream Communications Inc
6389 3341 3737 185 BellSouth.net Inc.
17974 2341 702 54 PT Telekomunikasi Indonesia
10620 2126 362 226 Types of queries are: POCs, o
28573 2124 1248 54 Types of queries are: POCs, o
18566 2087 382 179 Covad Communications Co.
4766 2081 11111 830 Korea Telecom (KIX)
1785 1949 681 133 PaeTec Communications, Inc.
22773 1867 2930 128 Cox Communications Inc.
7545 1745 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 3341 3156 BellSouth.net Inc.
17974 2341 2287 PT Telekomunikasi Indonesia
28573 2124 2070 Types of queries are: POCs, o
18566 2087 1908 Covad Communications Co.
10620 2126 1900 Types of queries are: POCs, o
1785 1949 1816 PaeTec Communications, Inc.
22773 1867 1739 Cox Communications Inc.
7545 1745 1657 TPG Internet Pty Ltd
8402 1580 1564 Corbina telecom
6503 1525 1454 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
59441 UNALLOCATED 5.144.130.0/24 51074 Gostaresh Ertebatate
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.

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
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 /8:20 /9:14 /10:30 /11:84 /12:236
/13:473 /14:843 /15:1545 /16:12332 /17:6431 /18:10738
/19:20989 /20:30159 /21:31797 /22:41766 /23:39494 /24:219276
/25:11 /26:22 /27:18 /28:145 /29:162 /30:84
/31:0 /32:138

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

ASN No of nets Total ann. Description
7029 2810 3454 Windstream Communications Inc
18566 2037 2087 Covad Communications Co.
6389 1852 3341 BellSouth.net Inc.
30036 1372 1439 Mediacom Communications Corp
8402 1301 1580 Corbina telecom
22773 1215 1867 Cox Communications Inc.
11492 1159 1196 CABLE ONE, INC.
6503 1049 1525 Axtel, S.A.B. de C.V.
1785 1043 1949 PaeTec Communications, Inc.
7011 933 1193 Frontier Communications of Am

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

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

1:545 2:748 3:1 4:13 5:387 6:3
8:451 12:2003 13:1 14:642 15:11 16:3
17:6 20:27 23:203 24:1816 27:1322 31:1058
32:50 33:2 34:2 36:8 37:745 38:823
39:2 40:133 41:3124 42:159 44:3 46:1591
47:2 49:471 50:592 52:13 54:17 55:5
56:1 57:33 58:935 59:524 60:237 61:1180
62:972 63:1999 64:4259 65:2235 66:4480 67:2037
68:1170 69:3189 70:983 71:523 72:1869 74:2564
75:494 76:326 77:942 78:931 79:481 80:1240
81:949 82:641 83:534 84:513 85:1140 86:482
87:925 88:351 89:1832 90:300 91:5168 92:589
93:1396 94:1573 95:1248 96:414 97:317 98:907
99:36 100:23 101:261 103:1441 105:512 106:117
107:198 108:420 109:1493 110:798 111:954 112:425
113:680 114:653 115:847 116:863 117:725 118:944
119:1201 120:299 121:677 122:1610 123:1171 124:1316
125:1270 128:521 129:179 130:271 131:627 132:295
133:22 134:238 135:61 136:216 137:236 138:339
139:185 140:474 141:277 142:467 143:358 144:477
145:82 146:499 147:253 148:735 149:293 150:151
151:174 152:449 153:177 154:19 155:436 156:219
157:336 158:180 159:561 160:343 161:386 162:407
163:179 164:685 165:410 166:562 167:542 168:953
169:124 170:906 171:145 172:6 173:1716 174:631
175:436 176:612 177:1110 178:1652 180:1346 181:132
182:1019 183:229 184:589 186:2132 187:1238 188:1550
189:1589 190:6148 192:5972 193:5513 194:4246 195:3256
196:1208 197:211 198:3706 199:4911 200:5864 201:1958
202:8484 203:8598 204:4334 205:2526 206:2662 207:2801
208:4043 209:3636 210:2748 211:1546 212:2029 213:1813
214:883 215:85 216:5113 217:1550 218:534 219:299
220:1236 221:510 222:303 223:315

End of report
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