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, August 18, 2013

[bgp-stats] Routing Table Report - London view

* BGP Routing Table Analysis Reports *
Routing Table Report 08:00 +10GMT Mon 19 Aug, 2013

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

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

BGP routing table entries examined: 457771
Prefixes after maximum aggregation: 185426
Deaggregation factor: 2.47
Unique aggregates announced to Internet: 229302
Total ASes present in the Internet Routing Table: 40754
Prefixes per ASN: 11.23
Origin-only ASes present in the Internet Routing Table: 34997
Origin ASes announcing only one prefix: 16238
Transit ASes present in the Internet Routing Table: 5750
Transit-only ASes present in the Internet Routing Table: 145
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: 287614
Unregistered ASNs in the Routing Table: 23350
Number of 32-bit ASNs allocated by the RIRs: 4957
Number of 32-bit ASNs visible in the Routing Table: 7
Prefixes from 32-bit ASNs in the Routing Table: 11653
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 312
Number of addresses announced to Internet: 2656141312
Equivalent to 158 /8s, 81 /16s and 128 /24s
Percentage of available address space announced: 71.7
Percentage of allocated address space announced: 71.7
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: 159625

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

Prefixes being announced by APNIC Region ASes: 106023
Total APNIC prefixes after maximum aggregation: 32622
APNIC Deaggregation factor: 3.25
Prefixes being announced from the APNIC address blocks: 108451
Unique aggregates announced from the APNIC address blocks: 46131
APNIC Region origin ASes present in the Internet Routing Table: 4828
APNIC Prefixes per ASN: 22.46
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 804
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: 724783360
Equivalent to 43 /8s, 51 /16s and 81 /24s
Percentage of available APNIC address space announced: 84.7

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: 159066
Total ARIN prefixes after maximum aggregation: 80381
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159655
Unique aggregates announced from the ARIN address blocks: 74722
ARIN Region origin ASes present in the Internet Routing Table: 15768
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5992
ARIN Region transit ASes present in the Internet Routing Table: 1607
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: 1070256640
Equivalent to 63 /8s, 202 /16s and 210 /24s
Percentage of available ARIN address space announced: 56.6

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: 118846
Total RIPE prefixes after maximum aggregation: 60438
RIPE Deaggregation factor: 1.97
Prefixes being announced from the RIPE address blocks: 122681
Unique aggregates announced from the RIPE address blocks: 78591
RIPE Region origin ASes present in the Internet Routing Table: 17341
RIPE Prefixes per ASN: 7.07
RIPE Region origin ASes announcing only one prefix: 8225
RIPE Region transit ASes present in the Internet Routing Table: 2781
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: 656885504
Equivalent to 39 /8s, 39 /16s and 71 /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: 49902
Total LACNIC prefixes after maximum aggregation: 9416
LACNIC Deaggregation factor: 5.30
Prefixes being announced from the LACNIC address blocks: 54540
Unique aggregates announced from the LACNIC address blocks: 25637
LACNIC Region origin ASes present in the Internet Routing Table: 1992
LACNIC Prefixes per ASN: 27.38
LACNIC Region origin ASes announcing only one prefix: 580
LACNIC Region transit ASes present in the Internet Routing Table: 353
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: 135104256
Equivalent to 8 /8s, 13 /16s and 135 /24s
Percentage of available LACNIC address space announced: 80.5

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: 11534
Total AfriNIC prefixes after maximum aggregation: 2529
AfriNIC Deaggregation factor: 4.56
Prefixes being announced from the AfriNIC address blocks: 12131
Unique aggregates announced from the AfriNIC address blocks: 3928
AfriNIC Region origin ASes present in the Internet Routing Table: 646
AfriNIC Prefixes per ASN: 18.78
AfriNIC Region origin ASes announcing only one prefix: 192
AfriNIC Region transit ASes present in the Internet Routing Table: 126
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: 1
Number of AfriNIC addresses announced to Internet: 46482176
Equivalent to 2 /8s, 197 /16s and 67 /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 2655 871 92 >>UNKNOWN<<
4766 2116 11553 619 Korea Telecom
7545 2050 321 112 TPG Telecom Limited
4755 1793 401 193 TATA Communications formerly
9829 1538 1221 45 >>UNKNOWN<<
9583 1222 92 507 Sify Limited
9498 1176 309 71 BHARTI Airtel Ltd.
7552 1128 1080 13 >>UNKNOWN<<
24560 1088 394 164 >>UNKNOWN<<
4808 1066 2022 308 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 2978 3689 62 BellSouth.net Inc.
18566 2063 382 183 Covad Communications Co.
22773 2041 2935 127 >>UNKNOWN<<
1785 2006 679 125 >>UNKNOWN<<
20115 1675 1646 621 Charter Communications
4323 1635 1122 411 >>UNKNOWN<<
701 1520 11103 798 >>UNKNOWN<<
30036 1365 305 642 >>UNKNOWN<<
7018 1323 11325 838 >>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 1592 544 16 >>UNKNOWN<<
34984 1295 241 215 >>UNKNOWN<<
31148 978 43 17 >>UNKNOWN<<
20940 968 349 743 >>UNKNOWN<<
2118 962 97 13 >>UNKNOWN<<
6830 899 2371 430 >>UNKNOWN<<
13188 843 99 70 >>UNKNOWN<<
8551 812 370 45 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 3137 1655 108 >>UNKNOWN<<
10620 2668 424 223 >>UNKNOWN<<
7303 1730 1157 220 >>UNKNOWN<<
18881 1332 844 20 >>UNKNOWN<<
8151 1265 2762 388 >>UNKNOWN<<
11830 945 364 15 >>UNKNOWN<<
27947 810 95 92 Telconet S.A
6503 784 434 65 Axtel, S.A.B. de C.V.
6147 740 374 25 >>UNKNOWN<<
3816 725 303 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 874 274 30 >>UNKNOWN<<
6713 543 633 26 Itissalat Al-MAGHRIB
8452 438 956 9 >>UNKNOWN<<
24835 291 80 8 >>UNKNOWN<<
3741 258 921 217 >>UNKNOWN<<
15706 221 32 6 >>UNKNOWN<<
29571 220 17 12 >>UNKNOWN<<
36992 220 501 29 >>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 3137 1655 108 >>UNKNOWN<<
6389 2978 3689 62 BellSouth.net Inc.
10620 2668 424 223 >>UNKNOWN<<
17974 2655 871 92 >>UNKNOWN<<
4766 2116 11553 619 Korea Telecom
18566 2063 382 183 Covad Communications Co.
7545 2050 321 112 TPG Telecom Limited
22773 2041 2935 127 >>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 2978 2916 BellSouth.net Inc.
17974 2655 2563 >>UNKNOWN<<
10620 2668 2445 >>UNKNOWN<<
7545 2050 1938 TPG Telecom Limited
22773 2041 1914 >>UNKNOWN<<
1785 2006 1881 >>UNKNOWN<<
18566 2063 1880 Covad Communications Co.
36998 1861 1856 MOBITEL
4755 1793 1600 TATA Communications formerly
8402 1592 1576 >>UNKNOWN<<

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
10158 UNALLOCATED 1.201.0.0/24 45991 >>UNKNOWN<<
10158 UNALLOCATED 1.201.1.0/24 45991 >>UNKNOWN<<
45991 UNALLOCATED 1.201.7.0/24 2914 NTT America, Inc.
9286 UNALLOCATED 1.201.64.0/18 9957 >>UNKNOWN<<
9286 UNALLOCATED 1.201.128.0/18 9957 >>UNKNOWN<<
9286 UNALLOCATED 1.201.192.0/18 9957 >>UNKNOWN<<
23724 UNALLOCATED 1.202.214.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.215.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.216.0/24 4134 No.31,Jin-rong Stree
23724 UNALLOCATED 1.202.217.0/24 4134 No.31,Jin-rong Stree

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<<
23.92.16.0/21 8001 >>UNKNOWN<<
23.92.24.0/22 6939 Hurricane Electric, Inc.
23.92.64.0/24 54540 >>UNKNOWN<<
23.92.65.0/24 54540 >>UNKNOWN<<
23.92.66.0/24 54540 >>UNKNOWN<<
23.92.67.0/24 54540 >>UNKNOWN<<
23.92.68.0/24 54540 >>UNKNOWN<<
23.92.69.0/24 54540 >>UNKNOWN<<
23.92.70.0/24 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 /15:1609 /16:12718 /17:6645 /18:10988
/19:22535 /20:32312 /21:34729 /22:48420 /23:42463 /24:242940
/25:8 /26:11 /27:11 /28:132 /29:206 /30:123
/31:0 /32:137

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

ASN No of nets Total ann. Description
18566 2014 2063 Covad Communications Co.
36998 1826 1861 MOBITEL
6389 1713 2978 BellSouth.net Inc.
22773 1330 2041 >>UNKNOWN<<
8402 1304 1592 >>UNKNOWN<<
30036 1228 1365 >>UNKNOWN<<
11492 1182 1221 >>UNKNOWN<<
1785 1079 2006 >>UNKNOWN<<
6983 1024 1151 ITC^Deltacom
10620 990 2668 >>UNKNOWN<<

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

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

1:797 2:762 3:3 4:16 5:910 6:17
8:589 12:1896 13:2 14:842 15:11 16:3
17:10 18:19 20:17 23:335 24:1732 27:1550
31:1385 32:40 33:2 34:5 36:70 37:1815
38:893 39:2 40:180 41:3233 42:241 44:9
46:1954 47:4 49:652 50:807 52:12 54:37
55:6 57:29 58:1092 59:641 60:329 61:1476
62:1185 63:1979 64:4356 65:2151 66:4195 67:2065
68:1090 69:3301 70:863 71:490 72:1918 74:2526
75:325 76:305 77:1112 78:1030 79:603 80:1307
81:1009 82:661 83:586 84:568 85:1217 86:476
87:1051 88:537 89:1823 90:158 91:5577 92:628
93:1662 94:2017 95:1588 96:587 97:346 98:1027
99:40 100:28 101:348 103:3135 105:519 106:139
107:210 108:480 109:1862 110:916 111:1095 112:570
113:801 114:706 115:1066 116:946 117:785 118:1121
119:1267 120:349 121:849 122:1766 123:1243 124:1333
125:1410 128:596 129:204 130:288 131:660 132:341
133:160 134:265 135:72 136:258 137:238 138:344
139:186 140:179 141:308 142:520 143:388 144:497
145:95 146:520 147:468 148:661 149:352 150:152
151:589 152:411 153:193 154:30 155:416 156:269
157:356 158:276 159:655 160:349 161:429 162:581
163:203 164:624 165:549 166:255 167:602 168:1022
169:125 170:1074 171:188 172:25 173:1575 174:569
175:479 176:1182 177:2158 178:1899 179:93 180:1513
181:640 182:1212 183:431 184:651 185:755 186:2472
187:1397 188:1874 189:1284 190:6992 192:6802 193:5544
194:4609 195:3593 196:1315 197:1000 198:4536 199:5348
200:5964 201:2598 202:8683 203:8792 204:4440 205:2589
206:2746 207:2824 208:3989 209:3575 210:2818 211:1548
212:2305 213:2015 214:924 215:99 216:5217 217:1656
218:608 219:317 220:1274 221:552 222:320 223:463


End of report
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