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 6, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Wed 07 Aug, 2013

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

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

BGP routing table entries examined: 456211
Prefixes after maximum aggregation: 184976
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 228567
Total ASes present in the Internet Routing Table: 40683
Prefixes per ASN: 11.21
Origin-only ASes present in the Internet Routing Table: 34941
Origin ASes announcing only one prefix: 16235
Transit ASes present in the Internet Routing Table: 5735
Transit-only ASes present in the Internet Routing Table: 143
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: 298872
Unregistered ASNs in the Routing Table: 24543
Number of 32-bit ASNs allocated by the RIRs: 4926
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11440
Special use prefixes present in the Routing Table: 35
Prefixes being announced from unallocated address space: 295
Number of addresses announced to Internet: 2652261120
Equivalent to 158 /8s, 22 /16s and 75 /24s
Percentage of available address space announced: 71.6
Percentage of allocated address space announced: 71.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.8
Total number of prefixes smaller than registry allocations: 158665

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

Prefixes being announced by APNIC Region ASes: 105673
Total APNIC prefixes after maximum aggregation: 32598
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108058
Unique aggregates announced from the APNIC address blocks: 46098
APNIC Region origin ASes present in the Internet Routing Table: 4825
APNIC Prefixes per ASN: 22.40
APNIC Region origin ASes announcing only one prefix: 1250
APNIC Region transit ASes present in the Internet Routing Table: 798
Average APNIC Region AS path length visible: 3.9
Max APNIC Region AS path length visible: 19
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 724275968
Equivalent to 43 /8s, 43 /16s and 147 /24s
Percentage of available APNIC address space announced: 84.6

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: 158774
Total ARIN prefixes after maximum aggregation: 80159
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159385
Unique aggregates announced from the ARIN address blocks: 74195
ARIN Region origin ASes present in the Internet Routing Table: 15741
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5997
ARIN Region transit ASes present in the Internet Routing Table: 1590
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 20
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1067731456
Equivalent to 63 /8s, 164 /16s and 74 /24s
Percentage of available ARIN address space announced: 56.5

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, 62464-63487, 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: 118599
Total RIPE prefixes after maximum aggregation: 60245
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122419
Unique aggregates announced from the RIPE address blocks: 78515
RIPE Region origin ASes present in the Internet Routing Table: 17307
RIPE Prefixes per ASN: 7.07
RIPE Region origin ASes announcing only one prefix: 8217
RIPE Region transit ASes present in the Internet Routing Table: 2788
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: 1
Number of RIPE addresses announced to Internet: 656629248
Equivalent to 39 /8s, 35 /16s and 94 /24s
Percentage of available RIPE address space announced: 95.5

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: 49302
Total LACNIC prefixes after maximum aggregation: 9401
LACNIC Deaggregation factor: 5.24
Prefixes being announced from the LACNIC address blocks: 53763
Unique aggregates announced from the LACNIC address blocks: 25516
LACNIC Region origin ASes present in the Internet Routing Table: 1983
LACNIC Prefixes per ASN: 27.11
LACNIC Region origin ASes announcing only one prefix: 581
LACNIC Region transit ASes present in the Internet Routing Table: 357
Average LACNIC Region AS path length visible: 4.2
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 2
Number of LACNIC addresses announced to Internet: 134375424
Equivalent to 8 /8s, 2 /16s and 104 /24s
Percentage of available LACNIC address space announced: 80.1

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 11682
Total AfriNIC prefixes after maximum aggregation: 2533
AfriNIC Deaggregation factor: 4.61
Prefixes being announced from the AfriNIC address blocks: 12290
Unique aggregates announced from the AfriNIC address blocks: 3968
AfriNIC Region origin ASes present in the Internet Routing Table: 650
AfriNIC Prefixes per ASN: 18.91
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 130
Average AfriNIC Region AS path length visible: 3.4
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1
Number of AfriNIC addresses announced to Internet: 46625024
Equivalent to 2 /8s, 199 /16s and 113 /24s
Percentage of available AfriNIC address space announced: 46.3

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 2650 871 92 >>UNKNOWN<<
4766 2114 11553 618 Korea Telecom
7545 2037 320 111 TPG Telecom Limited
4755 1793 401 193 TATA Communications formerly
9829 1531 1221 45 >>UNKNOWN<<
9583 1222 92 507 >>UNKNOWN<<
9498 1177 309 71 BHARTI Airtel Ltd.
7552 1112 1080 13 >>UNKNOWN<<
24560 1087 394 164 >>UNKNOWN<<
4808 1072 2028 312 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
6389 2981 3689 63 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
1785 2005 679 125 >>UNKNOWN<<
22773 2002 2927 123 >>UNKNOWN<<
20115 1672 1624 623 Charter Communications
4323 1622 1122 409 >>UNKNOWN<<
701 1521 11104 800 >>UNKNOWN<<
30036 1329 300 690 >>UNKNOWN<<
7018 1327 11069 840 >>UNKNOWN<<
11492 1221 218 363 >>UNKNOWN<<

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 1663 544 16 >>UNKNOWN<<
34984 1289 241 220 >>UNKNOWN<<
2118 1159 97 13 >>UNKNOWN<<
31148 977 43 19 >>UNKNOWN<<
20940 959 343 744 >>UNKNOWN<<
13188 842 99 72 >>UNKNOWN<<
8551 823 370 45 Bezeqint Internet Backbone
6830 780 2371 431 >>UNKNOWN<<
12479 680 796 52 >>UNKNOWN<<
9198 554 343 21 >>UNKNOWN<<

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 3030 1595 110 >>UNKNOWN<<
10620 2652 421 228 >>UNKNOWN<<
7303 1729 1156 221 >>UNKNOWN<<
18881 1281 844 20 >>UNKNOWN<<
8151 1262 2757 387 >>UNKNOWN<<
6503 814 434 65 Axtel, S.A.B. de C.V.
27947 811 95 93 Telconet S.A
11830 749 364 15 >>UNKNOWN<<
3816 726 303 85 >>UNKNOWN<<
7738 698 1370 35 >>UNKNOWN<<

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
36998 1861 112 5 MOBITEL
24863 873 274 30 >>UNKNOWN<<
6713 542 617 25 Itissalat Al-MAGHRIB
8452 435 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
36992 214 527 23 >>UNKNOWN<<
12258 193 28 71 MWEB-12258

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
28573 3030 1595 110 >>UNKNOWN<<
6389 2981 3689 63 BellSouth.net Inc.
10620 2652 421 228 >>UNKNOWN<<
17974 2650 871 92 >>UNKNOWN<<
4766 2114 11553 618 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2037 320 111 TPG Telecom Limited
1785 2005 679 125 >>UNKNOWN<<
22773 2002 2927 123 >>UNKNOWN<<
36998 1861 112 5 MOBITEL

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 2981 2918 BellSouth.net Inc.
17974 2650 2558 >>UNKNOWN<<
10620 2652 2424 >>UNKNOWN<<
7545 2037 1926 TPG Telecom Limited
18566 2063 1880 Covad Communications Co.
1785 2005 1880 >>UNKNOWN<<
22773 2002 1879 >>UNKNOWN<<
36998 1861 1856 MOBITEL
8402 1663 1647 >>UNKNOWN<<
4755 1793 1600 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
17443 UNALLOCATED 1.186.192.0/24 9498 BHARTI Airtel Ltd.
17443 UNALLOCATED 1.186.193.0/24 9498 BHARTI Airtel Ltd.
17443 UNALLOCATED 1.186.194.0/24 9498 BHARTI Airtel Ltd.
17443 UNALLOCATED 1.186.195.0/24 9498 BHARTI Airtel Ltd.
45271 UNALLOCATED 1.187.0.0/19 55644 >>UNKNOWN<<
45271 UNALLOCATED 1.187.32.0/19 55644 >>UNKNOWN<<
45271 UNALLOCATED 1.187.64.0/20 4755 TATA Communications
45271 UNALLOCATED 1.187.80.0/20 9498 BHARTI Airtel Ltd.
45271 UNALLOCATED 1.187.96.0/20 17917 >>UNKNOWN<<
45271 UNALLOCATED 1.187.112.0/20 9498 BHARTI Airtel Ltd.

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
128.0.0.0/24 2541 >>UNKNOWN<<
128.0.16.0/21 43568 Romerike Bredband AS
128.0.24.0/21 41794 Sibirskie Seti Ltd.
128.0.40.0/24 60449 >>UNKNOWN<<
128.0.42.0/24 60619 >>UNKNOWN<<
128.0.43.0/24 60619 >>UNKNOWN<<
128.0.45.0/24 60657 >>UNKNOWN<<
128.0.46.0/23 39743 Voxility S.R.L.
128.0.53.0/24 60993 >>UNKNOWN<<

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
23.90.4.0/24 30693 >>UNKNOWN<<
23.90.5.0/24 30693 >>UNKNOWN<<
23.90.8.0/24 30693 >>UNKNOWN<<
62.61.220.0/24 24974 >>UNKNOWN<<
62.61.221.0/24 24974 >>UNKNOWN<<
62.182.96.0/23 15830 >>UNKNOWN<<
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.

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 /8:17 /9:11 /10:31 /11:92 /12:250
/13:478 /14:902 /15:1602 /16:12700 /17:6641 /18:11036
/19:22506 /20:32225 /21:34657 /22:48303 /23:42314 /24:241821
/25:8 /26:11 /27:11 /28:133 /29:205 /30:121
/31:0 /32:136

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1715 2981 BellSouth.net Inc.
8402 1366 1663 >>UNKNOWN<<
22773 1303 2002 >>UNKNOWN<<
30036 1194 1329 >>UNKNOWN<<
11492 1182 1221 >>UNKNOWN<<
1785 1078 2005 >>UNKNOWN<<
6983 1021 1148 ITC^Deltacom
10620 987 2652 >>UNKNOWN<<

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

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

1:819 2:778 3:3 4:16 5:913 6:17
8:588 12:1909 13:2 14:843 15:11 16:2
17:10 18:19 20:17 23:302 24:1768 27:1530
31:1377 32:40 33:2 34:5 36:71 37:1843
38:886 39:2 40:175 41:3306 42:232 44:7
46:1959 47:3 49:658 50:798 52:12 54:37
55:7 57:29 58:1085 59:610 60:329 61:1478
62:1179 63:2001 64:4343 65:2150 66:4191 67:2028
68:1092 69:3275 70:801 71:487 72:1922 74:2517
75:325 76:303 77:1103 78:1047 79:608 80:1283
81:1019 82:656 83:583 84:580 85:1216 86:464
87:1020 88:534 89:1809 90:152 91:5529 92:620
93:1693 94:1942 95:1629 96:591 97:345 98:1031
99:40 100:28 101:342 103:3083 105:523 106:139
107:208 108:501 109:1854 110:938 111:1073 112:566
113:811 114:688 115:1059 116:941 117:789 118:1113
119:1271 120:349 121:849 122:1764 123:1238 124:1336
125:1398 128:600 129:198 130:296 131:660 132:353
133:160 134:262 135:72 136:259 137:238 138:344
139:185 140:173 141:306 142:514 143:389 144:530
145:92 146:528 147:407 148:658 149:350 150:151
151:585 152:411 153:189 154:28 155:419 156:272
157:354 158:275 159:658 160:349 161:430 162:535
163:203 164:576 165:509 166:254 167:600 168:1017
169:125 170:1066 171:188 172:23 173:1560 174:564
175:485 176:1145 177:2117 178:1889 179:82 180:1499
181:601 182:1216 183:418 184:646 185:712 186:2340
187:1369 188:1859 189:1298 190:6818 192:6772 193:5623
194:4720 195:3597 196:1335 197:1011 198:4526 199:5342
200:5984 201:2422 202:8681 203:8798 204:4448 205:2575
206:2733 207:2830 208:4000 209:3588 210:2819 211:1527
212:2214 213:2007 214:906 215:100 216:5220 217:1640
218:605 219:324 220:1271 221:551 222:316 223:460


End of report
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