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.

Wednesday, September 5, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 06 Sep, 2012

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

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

BGP routing table entries examined: 424805
Prefixes after maximum aggregation: 178111
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207215
Total ASes present in the Internet Routing Table: 42024
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33572
Origin ASes announcing only one prefix: 15740
Transit ASes present in the Internet Routing Table: 5602
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 701
Unregistered ASNs in the Routing Table: 240
Number of 32-bit ASNs allocated by the RIRs: 3214
Number of 32-bit ASNs visible in the Routing Table: 2850
Prefixes from 32-bit ASNs in the Routing Table: 7469
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 176
Number of addresses announced to Internet: 2592847660
Equivalent to 154 /8s, 139 /16s and 183 /24s
Percentage of available address space announced: 70.0
Percentage of allocated address space announced: 70.0
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: 150123

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

Prefixes being announced by APNIC Region ASes: 102045
Total APNIC prefixes after maximum aggregation: 32888
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102659
Unique aggregates announced from the APNIC address blocks: 42617
APNIC Region origin ASes present in the Internet Routing Table: 4749
APNIC Prefixes per ASN: 21.62
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 760
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 294
Number of APNIC addresses announced to Internet: 707710624
Equivalent to 42 /8s, 46 /16s and 206 /24s
Percentage of available APNIC address space announced: 82.7

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: 154178
Total ARIN prefixes after maximum aggregation: 78008
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155155
Unique aggregates announced from the ARIN address blocks: 69079
ARIN Region origin ASes present in the Internet Routing Table: 15224
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5742
ARIN Region transit ASes present in the Internet Routing Table: 1600
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1083331200
Equivalent to 64 /8s, 146 /16s and 82 /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: 107435
Total RIPE prefixes after maximum aggregation: 56480
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109832
Unique aggregates announced from the RIPE address blocks: 69766
RIPE Region origin ASes present in the Internet Routing Table: 16827
RIPE Prefixes per ASN: 6.53
RIPE Region origin ASes announcing only one prefix: 8153
RIPE Region transit ASes present in the Internet Routing Table: 2708
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1857
Number of RIPE addresses announced to Internet: 643277284
Equivalent to 38 /8s, 87 /16s and 161 /24s
Percentage of available RIPE address space announced: 93.5

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: 43672
Total LACNIC prefixes after maximum aggregation: 8472
LACNIC Deaggregation factor: 5.15
Prefixes being announced from the LACNIC address blocks: 46642
Unique aggregates announced from the LACNIC address blocks: 22160
LACNIC Region origin ASes present in the Internet Routing Table: 1641
LACNIC Prefixes per ASN: 28.42
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 320
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 676
Number of LACNIC addresses announced to Internet: 115288616
Equivalent to 6 /8s, 223 /16s and 42 /24s
Percentage of available LACNIC address space announced: 68.7

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: 9871
Total AfriNIC prefixes after maximum aggregation: 2206
AfriNIC Deaggregation factor: 4.47
Prefixes being announced from the AfriNIC address blocks: 10341
Unique aggregates announced from the AfriNIC address blocks: 3448
AfriNIC Region origin ASes present in the Internet Routing Table: 560
AfriNIC Prefixes per ASN: 18.47
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 126
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 41689600
Equivalent to 2 /8s, 124 /16s and 34 /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
4766 2943 11124 1413 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1752 301 86 TPG Internet Pty Ltd
4755 1616 387 161 TATA Communications formerly
9829 1329 1104 36 BSNL National Internet Backbo
9583 1178 87 508 Sify Limited
4808 1123 2074 322 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1003 310 73 BHARTI Airtel Ltd.

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC

ARIN Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
7029 3459 990 154 Windstream Communications Inc
6389 3341 3737 185 bellsouth.net, inc.
18566 2086 382 179 Covad Communications
1785 1914 678 129 PaeTec Communications, Inc.
22773 1869 2930 128 Cox Communications, Inc.
20115 1658 1578 614 Charter Communications
4323 1580 1026 385 Time Warner Telecom
30036 1432 281 738 Mediacom Communications Corp
7018 1255 10316 828 AT&T WorldNet Services
11492 1198 217 343 Cable One

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN

RIPE Region per AS prefix count summary
---------------------------------------

ASN No of nets /20 equiv MaxAgg Description
8402 1689 544 16 Corbina telecom
15557 1221 2247 55 LDCOM NETWORKS
12479 830 765 82 Uni2 Autonomous System
34984 754 205 178 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
31148 710 37 9 FreeNet ISP
20940 706 224 548 Akamai Technologies European
13188 700 100 9 Educational Network
2118 685 97 14 EUnet/RELCOM Autonomous Syste
58113 616 69 362 LIR DATACENTER TELECOM SRL

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE

LACNIC Region per AS prefix count summary
-----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
28573 2136 1248 54 NET Servicos de Comunicao S.A
10620 2130 362 221 TVCABLE BOGOTA
8151 1570 3032 343 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 839 81 15 GUATEL
27947 721 74 94 Telconet S.A
3816 638 262 95 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
22047 580 326 15 VTR PUNTO NET S.A.

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

AfriNIC Region per AS prefix count summary
------------------------------------------

ASN No of nets /20 equiv MaxAgg Description
24863 870 275 36 LINKdotNET AS number
8452 836 958 13 TEDATA
36998 777 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 267 80 8 RAYA Telecom - Egypt
3741 262 904 223 The Internet Solution
33776 231 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/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
7029 3459 990 154 Windstream Communications Inc
6389 3341 3737 185 bellsouth.net, inc.
4766 2943 11124 1413 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
28573 2136 1248 54 NET Servicos de Comunicao S.A
10620 2130 362 221 TVCABLE BOGOTA
18566 2086 382 179 Covad Communications
1785 1914 678 129 PaeTec Communications, Inc.
22773 1869 2930 128 Cox Communications, Inc.
7545 1752 301 86 TPG Internet Pty Ltd

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
6389 3341 3156 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2136 2082 NET Servicos de Comunicao S.A
10620 2130 1909 TVCABLE BOGOTA
18566 2086 1907 Covad Communications
1785 1914 1785 PaeTec Communications, Inc.
22773 1869 1741 Cox Communications, Inc.
8402 1689 1673 Corbina telecom
7545 1752 1666 TPG Internet Pty Ltd
4766 2943 1530 Korea Telecom (KIX)

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

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

Bad AS Designation Network Transit AS Description
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
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 Labs2
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/current/data-badAS

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

Network Origin AS Description
5.207.0.0/16 21497 UMC Autonomous System
5.208.0.0/12 51074 Gostaresh Ertebatate Mabna Co
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

Complete listing at http://thyme.rand.apnic.net/current/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 /8:18 /9:14 /10:29 /11:84 /12:237
/13:475 /14:842 /15:1541 /16:12382 /17:6413 /18:10838
/19:21044 /20:30213 /21:31987 /22:42281 /23:39829 /24:222532
/25:1316 /26:1543 /27:907 /28:174 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2815 3459 Windstream Communications Inc
18566 2036 2086 Covad Communications
6389 1852 3341 bellsouth.net, inc.
8402 1410 1689 Corbina telecom
30036 1365 1432 Mediacom Communications Corp
22773 1217 1869 Cox Communications, Inc.
15557 1165 1221 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1053 1535 AVANTEL, S.A.
1785 1013 1914 PaeTec Communications, Inc.

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

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

1:566 2:788 3:1 4:13 5:427 6:3
8:453 12:2004 13:1 14:660 15:11 16:3
17:6 20:27 23:205 24:1822 27:1328 31:1022
32:56 33:2 34:2 36:7 37:757 38:829
39:2 40:133 41:3130 42:158 44:3 46:1530
47:2 49:467 50:594 52:13 54:17 55:6
56:1 57:31 58:1002 59:528 60:240 61:1289
62:1002 63:2005 64:4263 65:2243 66:4491 67:2044
68:1171 69:3189 70:985 71:523 72:1867 74:2577
75:495 76:323 77:949 78:939 79:487 80:1268
81:952 82:640 83:532 84:626 85:1155 86:808
87:924 88:351 89:1791 90:303 91:5190 92:580
93:1521 94:1630 95:1274 96:414 97:318 98:893
99:39 100:23 101:262 103:1473 105:512 106:118
107:198 108:439 109:1914 110:795 111:959 112:435
113:670 114:652 115:854 116:881 117:732 118:952
119:1244 120:307 121:690 122:1656 123:1171 124:1361
125:1270 128:554 129:186 130:281 131:633 132:302
133:22 134:252 135:61 136:217 137:238 138:342
139:187 140:501 141:279 142:486 143:363 144:487
145:80 146:514 147:257 148:760 149:312 150:158
151:174 152:452 153:182 154:20 155:418 156:222
157:381 158:184 159:641 160:343 161:413 162:408
163:190 164:695 165:415 166:562 167:544 168:957
169:125 170:907 171:149 172:6 173:1723 174:620
175:442 176:574 177:1114 178:1654 180:1353 181:134
182:1040 183:228 184:595 186:2204 187:1228 188:1542
189:1584 190:6129 192:6030 193:5516 194:4237 195:3264
196:1213 197:214 198:3764 199:4966 200:5996 201:1972
202:8687 203:8681 204:4412 205:2543 206:2751 207:2872
208:4057 209:3662 210:2827 211:1520 212:2026 213:1807
214:889 215:86 216:5141 217:1556 218:548 219:317
220:1238 221:531 222:339 223:377

End of report
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