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 1, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 02 Sep, 2013

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

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

BGP routing table entries examined: 460591
Prefixes after maximum aggregation: 186097
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 230887
Total ASes present in the Internet Routing Table: 40845
Prefixes per ASN: 11.28
Origin-only ASes present in the Internet Routing Table: 35060
Origin ASes announcing only one prefix: 16280
Transit ASes present in the Internet Routing Table: 5778
Transit-only ASes present in the Internet Routing Table: 153
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: 273608
Unregistered ASNs in the Routing Table: 21568
Number of 32-bit ASNs allocated by the RIRs: 4995
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11749
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 364
Number of addresses announced to Internet: 2659983360
Equivalent to 158 /8s, 140 /16s and 32 /24s
Percentage of available address space announced: 71.8
Percentage of allocated address space announced: 71.8
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.9
Total number of prefixes smaller than registry allocations: 160640

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

Prefixes being announced by APNIC Region ASes: 106358
Total APNIC prefixes after maximum aggregation: 32714
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 108894
Unique aggregates announced from the APNIC address blocks: 46424
APNIC Region origin ASes present in the Internet Routing Table: 4833
APNIC Prefixes per ASN: 22.53
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 808
Average APNIC Region AS path length visible: 3.8
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 1
Number of APNIC addresses announced to Internet: 726427648
Equivalent to 43 /8s, 76 /16s and 104 /24s
Percentage of available APNIC address space announced: 84.9

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: 159945
Total ARIN prefixes after maximum aggregation: 80459
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 160478
Unique aggregates announced from the ARIN address blocks: 75269
ARIN Region origin ASes present in the Internet Routing Table: 15791
ARIN Prefixes per ASN: 10.16
ARIN Region origin ASes announcing only one prefix: 6024
ARIN Region transit ASes present in the Internet Routing Table: 1617
Average ARIN Region AS path length visible: 3.3
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 2
Number of ARIN addresses announced to Internet: 1070944000
Equivalent to 63 /8s, 213 /16s and 79 /24s
Percentage of available ARIN address space announced: 56.7

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: 119796
Total RIPE prefixes after maximum aggregation: 60860
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 123677
Unique aggregates announced from the RIPE address blocks: 79230
RIPE Region origin ASes present in the Internet Routing Table: 17375
RIPE Prefixes per ASN: 7.12
RIPE Region origin ASes announcing only one prefix: 8247
RIPE Region transit ASes present in the Internet Routing Table: 2782
Average RIPE Region AS path length visible: 3.5
Max RIPE Region AS path length visible: 21
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1
Number of RIPE addresses announced to Internet: 657237760
Equivalent to 39 /8s, 44 /16s and 167 /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: 50245
Total LACNIC prefixes after maximum aggregation: 9474
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 54832
Unique aggregates announced from the LACNIC address blocks: 25739
LACNIC Region origin ASes present in the Internet Routing Table: 1992
LACNIC Prefixes per ASN: 27.53
LACNIC Region origin ASes announcing only one prefix: 568
LACNIC Region transit ASes present in the Internet Routing Table: 360
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: 135821056
Equivalent to 8 /8s, 24 /16s and 119 /24s
Percentage of available LACNIC address space announced: 81.0

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: 11744
Total AfriNIC prefixes after maximum aggregation: 2543
AfriNIC Deaggregation factor: 4.62
Prefixes being announced from the AfriNIC address blocks: 12345
Unique aggregates announced from the AfriNIC address blocks: 3885
AfriNIC Region origin ASes present in the Internet Routing Table: 660
AfriNIC Prefixes per ASN: 18.70
AfriNIC Region origin ASes announcing only one prefix: 199
AfriNIC Region transit ASes present in the Internet Routing Table: 135
Average AfriNIC Region AS path length visible: 3.3
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: 46529280
Equivalent to 2 /8s, 197 /16s and 251 /24s
Percentage of available AfriNIC address space announced: 46.2

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 2667 903 91 >>UNKNOWN<<
4766 2117 11553 622 Korea Telecom
7545 2056 321 112 TPG Telecom Limited
4755 1797 401 194 TATA Communications formerly
9829 1529 1221 45 >>UNKNOWN<<
9583 1225 92 509 Sify Limited
9498 1183 309 71 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1089 394 160 >>UNKNOWN<<
4808 1068 2022 309 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 3069 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2046 2933 126 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
20115 1674 1645 630 Charter Communications
4323 1623 1119 409 >>UNKNOWN<<
701 1521 11119 798 >>UNKNOWN<<
30036 1348 302 643 >>UNKNOWN<<
7018 1320 11309 838 >>UNKNOWN<<
11492 1220 218 366 >>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 1641 544 16 >>UNKNOWN<<
2118 1368 97 13 >>UNKNOWN<<
34984 1310 244 221 >>UNKNOWN<<
31148 982 43 18 >>UNKNOWN<<
20940 972 350 749 >>UNKNOWN<<
6830 896 2367 429 >>UNKNOWN<<
13188 846 99 72 >>UNKNOWN<<
8551 794 370 41 Bezeqint Internet Backbone
12479 687 797 53 >>UNKNOWN<<
9116 553 326 34 >>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 3187 1695 101 >>UNKNOWN<<
10620 2612 422 239 >>UNKNOWN<<
7303 1733 1158 223 >>UNKNOWN<<
18881 1452 844 20 >>UNKNOWN<<
8151 1270 2772 389 >>UNKNOWN<<
11830 933 364 15 >>UNKNOWN<<
27947 812 95 92 Telconet S.A
6503 789 434 65 Axtel, S.A.B. de C.V.
6147 734 374 25 Telefonica del Peru S.A.A.
3816 727 303 85 >>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 870 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 435 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
36992 222 501 28 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
37054 211 11 5 Data Telecom Service

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 3187 1695 101 >>UNKNOWN<<
6389 3069 3689 62 BellSouth.net Inc.
17974 2667 903 91 >>UNKNOWN<<
10620 2612 422 239 >>UNKNOWN<<
4766 2117 11553 622 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2056 321 112 TPG Telecom Limited
22773 2046 2933 126 >>UNKNOWN<<
1785 2006 679 125 >>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 3069 3007 BellSouth.net Inc.
17974 2667 2576 >>UNKNOWN<<
10620 2612 2373 >>UNKNOWN<<
7545 2056 1944 TPG Telecom Limited
22773 2046 1920 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
8402 1641 1625 >>UNKNOWN<<
4755 1797 1603 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
9638 UNALLOCATED 1.214.72.0/24 3786 LG DACOM Corporation
9638 UNALLOCATED 1.214.73.0/24 3786 LG DACOM Corporation
9638 UNALLOCATED 1.214.92.0/24 3786 LG DACOM Corporation
38707 UNALLOCATED 1.214.105.0/24 3786 LG DACOM Corporation
38707 UNALLOCATED 1.214.106.0/24 3786 LG DACOM Corporation
55627 UNALLOCATED 1.214.126.0/24 4766 Korea Telecom
55627 UNALLOCATED 1.214.127.0/24 4766 Korea Telecom
55586 UNALLOCATED 1.224.172.0/24 4766 Korea Telecom
55586 UNALLOCATED 1.224.172.0/22 9318 Hanaro Telecom Inc.
55586 UNALLOCATED 1.224.173.0/24 4766 Korea Telecom

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
100.64.0.0/10 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
192.0.0.0/24 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
198.51.100.0/24 65333 Internet Assigned Numbers Aut
203.0.113.0/24 65333 Internet Assigned Numbers Aut

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

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

Network Origin AS Description
23.90.128.0/18 27418 >>UNKNOWN<<
23.90.192.0/18 36086 >>UNKNOWN<<
23.91.0.0/19 40676 >>UNKNOWN<<
23.91.32.0/19 36315 >>UNKNOWN<<
23.92.16.0/21 8001 >>UNKNOWN<<
23.92.24.0/22 6939 Hurricane Electric, Inc.
23.92.48.0/20 29761 >>UNKNOWN<<
23.92.64.0/24 54540 >>UNKNOWN<<
23.92.65.0/24 54540 >>UNKNOWN<<
23.92.66.0/24 54540 >>UNKNOWN<<

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 /11:93 /12:251
/13:478 /14:903 /15:1620 /16:12753 /17:6677 /18:11024
/19:22645 /20:32343 /21:34879 /22:48673 /23:42462 /24:245095
/25:8 /26:11 /27:11 /28:131 /29:202 /30:133
/31:0 /32:140

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1714 3069 BellSouth.net Inc.
8402 1373 1641 >>UNKNOWN<<
22773 1332 2046 >>UNKNOWN<<
30036 1211 1348 >>UNKNOWN<<
11492 1181 1220 >>UNKNOWN<<
1785 1078 2006 >>UNKNOWN<<
6983 1025 1150 ITC^Deltacom
10620 942 2612 >>UNKNOWN<<

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

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

1:782 2:858 3:3 4:16 5:933 6:19
8:596 12:1896 13:2 14:847 15:11 16:3
17:11 18:19 20:18 23:372 24:1738 27:1553
31:1422 32:40 33:2 34:5 36:73 37:1847
38:895 39:4 40:179 41:3311 42:243 44:9
46:1952 47:5 49:662 50:804 52:12 54:37
55:4 57:29 58:1108 59:649 60:333 61:1473
62:1222 63:1986 64:4565 65:2293 66:4173 67:2073
68:1087 69:3285 70:863 71:494 72:2002 74:2538
75:326 76:304 77:1135 78:1043 79:626 80:1319
81:1023 82:641 83:582 84:577 85:1238 86:479
87:1048 88:539 89:1830 90:158 91:5595 92:635
93:1665 94:2019 95:1553 96:524 97:347 98:1038
99:41 100:28 101:345 103:3221 105:519 106:139
107:209 108:479 109:1868 110:940 111:1111 112:568
113:788 114:686 115:1063 116:956 117:785 118:1131
119:1273 120:353 121:849 122:1788 123:1243 124:1347
125:1416 128:572 129:203 130:298 131:662 132:344
133:160 134:275 135:67 136:265 137:264 138:347
139:176 140:170 141:309 142:534 143:380 144:488
145:100 146:515 147:479 148:667 149:354 150:150
151:565 152:411 153:195 154:30 155:480 156:271
157:358 158:282 159:666 160:350 161:430 162:621
163:203 164:623 165:554 166:255 167:605 168:1022
169:125 170:1076 171:191 172:25 173:1594 174:516
175:482 176:1187 177:2118 178:1916 179:115 180:1515
181:690 182:1238 183:440 184:635 185:796 186:2453
187:1369 188:1907 189:1283 190:7005 192:6870 193:5845
194:4707 195:3590 196:1345 197:1076 198:4595 199:5398
200:5971 201:2593 202:8730 203:8805 204:4450 205:2578
206:2744 207:2828 208:3992 209:3610 210:2831 211:1541
212:2301 213:2052 214:912 215:101 216:5263 217:1654
218:612 219:327 220:1273 221:555 222:323 223:501


End of report
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