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 9, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 426019
Prefixes after maximum aggregation: 178283
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207462
Total ASes present in the Internet Routing Table: 42041
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33577
Origin ASes announcing only one prefix: 15752
Transit ASes present in the Internet Routing Table: 5605
Transit-only ASes present in the Internet Routing Table: 131
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: 705
Unregistered ASNs in the Routing Table: 250
Number of 32-bit ASNs allocated by the RIRs: 3241
Number of 32-bit ASNs visible in the Routing Table: 2859
Prefixes from 32-bit ASNs in the Routing Table: 7561
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 170
Number of addresses announced to Internet: 2593137676
Equivalent to 154 /8s, 144 /16s and 36 /24s
Percentage of available address space announced: 70.0
Percentage of allocated address space announced: 70.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.5
Total number of prefixes smaller than registry allocations: 150304

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

Prefixes being announced by APNIC Region ASes: 102212
Total APNIC prefixes after maximum aggregation: 33010
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102830
Unique aggregates announced from the APNIC address blocks: 42634
APNIC Region origin ASes present in the Internet Routing Table: 4753
APNIC Prefixes per ASN: 21.63
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 763
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 27
Number of APNIC region 32-bit ASNs visible in the Routing Table: 296
Number of APNIC addresses announced to Internet: 707730048
Equivalent to 42 /8s, 47 /16s and 26 /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: 154409
Total ARIN prefixes after maximum aggregation: 77996
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155401
Unique aggregates announced from the ARIN address blocks: 69117
ARIN Region origin ASes present in the Internet Routing Table: 15225
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1597
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: 1083383424
Equivalent to 64 /8s, 147 /16s and 30 /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: 108060
Total RIPE prefixes after maximum aggregation: 56565
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 110513
Unique aggregates announced from the RIPE address blocks: 69913
RIPE Region origin ASes present in the Internet Routing Table: 16839
RIPE Prefixes per ASN: 6.56
RIPE Region origin ASes announcing only one prefix: 8159
RIPE Region transit ASes present in the Internet Routing Table: 2717
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: 1866
Number of RIPE addresses announced to Internet: 644653540
Equivalent to 38 /8s, 108 /16s and 161 /24s
Percentage of available RIPE address space announced: 93.7

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: 43777
Total LACNIC prefixes after maximum aggregation: 8451
LACNIC Deaggregation factor: 5.18
Prefixes being announced from the LACNIC address blocks: 46770
Unique aggregates announced from the LACNIC address blocks: 22188
LACNIC Region origin ASes present in the Internet Routing Table: 1640
LACNIC Prefixes per ASN: 28.52
LACNIC Region origin ASes announcing only one prefix: 438
LACNIC Region transit ASes present in the Internet Routing Table: 322
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: 674
Number of LACNIC addresses announced to Internet: 115369512
Equivalent to 6 /8s, 224 /16s and 102 /24s
Percentage of available LACNIC address space announced: 68.8

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: 9859
Total AfriNIC prefixes after maximum aggregation: 2204
AfriNIC Deaggregation factor: 4.47
Prefixes being announced from the AfriNIC address blocks: 10335
Unique aggregates announced from the AfriNIC address blocks: 3472
AfriNIC Region origin ASes present in the Internet Routing Table: 561
AfriNIC Prefixes per ASN: 18.42
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 124
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: 41703168
Equivalent to 2 /8s, 124 /16s and 87 /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 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1753 301 87 TPG Internet Pty Ltd
4755 1618 387 162 TATA Communications formerly
9829 1324 1101 31 BSNL National Internet Backbo
9583 1180 87 509 Sify Limited
4808 1121 2049 319 CNCGROUP IP network: China169
7552 1120 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1004 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 3456 990 154 Windstream Communications Inc
6389 3333 3736 185 bellsouth.net, inc.
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
20115 1658 1578 614 Charter Communications
4323 1581 1026 386 Time Warner Telecom
30036 1417 279 746 Mediacom Communications Corp
7018 1260 10317 831 AT&T WorldNet Services
11492 1197 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 1694 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1221 2247 55 LDCOM NETWORKS
12479 830 765 82 Uni2 Autonomous System
34984 757 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 716 229 553 Akamai Technologies European
31148 713 37 9 FreeNet ISP
13188 703 100 9 Educational Network
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 2139 1248 54 NET Servicos de Comunicao S.A
10620 2132 362 222 TVCABLE BOGOTA
8151 1572 3034 348 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1536 451 70 AVANTEL, S.A.
6458 791 81 15 GUATEL
27947 720 74 94 Telconet S.A
3816 639 263 95 Empresa Nacional de Telecomun
11172 594 101 70 Servicios Alestra S.A de C.V
14420 581 83 100 CORPORACION NACIONAL DE TELEC

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 878 275 36 LINKdotNET AS number
8452 835 958 13 TEDATA
36998 774 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 263 904 223 The Internet Solution
12258 194 28 66 Vodacom Internet Company
33776 194 13 11 Starcomms Nigeria Limited
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 3456 990 154 Windstream Communications Inc
6389 3333 3736 185 bellsouth.net, inc.
4766 2951 11125 1419 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
28573 2139 1248 54 NET Servicos de Comunicao S.A
10620 2132 362 222 TVCABLE BOGOTA
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1887 2931 129 Cox Communications, Inc.
7545 1753 301 87 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 3333 3148 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2139 2085 NET Servicos de Comunicao S.A
10620 2132 1910 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1887 1758 Cox Communications, Inc.
8402 1694 1678 Corbina telecom
7545 1753 1666 TPG Internet Pty Ltd
4766 2951 1532 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
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.
59457 UNALLOCATED 5.149.67.0/24 35567 DASTO semtel d.o.o.

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

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

Network Origin AS Description
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 DAC AS Germany

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
/13:476 /14:841 /15:1542 /16:12379 /17:6415 /18:10845
/19:21056 /20:30238 /21:32116 /22:42337 /23:39891 /24:223256
/25:1406 /26:1644 /27:918 /28:171 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2812 3456 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1849 3333 bellsouth.net, inc.
8402 1417 1694 Corbina telecom
30036 1350 1417 Mediacom Communications Corp
22773 1230 1887 Cox Communications, Inc.
15557 1165 1221 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1536 AVANTEL, S.A.
1785 1013 1912 PaeTec Communications, Inc.

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

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

1:597 2:782 3:1 4:13 5:441 6:3
8:455 12:2002 13:1 14:658 15:11 16:3
17:6 20:27 23:202 24:1825 27:1327 31:898
32:56 33:2 34:2 36:7 37:762 38:825
39:2 40:133 41:3105 42:158 44:3 46:1556
47:2 49:469 50:593 52:13 54:17 55:8
56:1 57:31 58:988 59:528 60:241 61:1294
62:951 63:2004 64:4266 65:2246 66:4497 67:2051
68:1169 69:3202 70:985 71:523 72:1872 74:2583
75:496 76:322 77:950 78:942 79:489 80:1267
81:956 82:631 83:530 84:625 85:1155 86:805
87:923 88:350 89:1797 90:303 91:5199 92:577
93:1529 94:1620 95:1268 96:416 97:318 98:894
99:39 100:23 101:261 103:1496 105:512 106:118
107:198 108:444 109:1920 110:795 111:963 112:450
113:708 114:657 115:850 116:828 117:729 118:931
119:1256 120:305 121:689 122:1654 123:1169 124:1346
125:1273 128:549 129:186 130:282 131:632 132:310
133:22 134:250 135:61 136:216 137:238 138:342
139:187 140:501 141:280 142:486 143:368 144:488
145:80 146:509 147:275 148:758 149:323 150:157
151:177 152:451 153:182 154:20 155:419 156:222
157:380 158:184 159:645 160:343 161:414 162:408
163:190 164:692 165:417 166:560 167:545 168:960
169:125 170:905 171:149 172:6 173:1723 174:627
175:426 176:575 177:1095 178:1661 180:1343 181:134
182:1042 183:228 184:597 186:2198 187:1245 188:1530
189:1586 190:6129 192:6031 193:5708 194:4557 195:3447
196:1214 197:221 198:3774 199:4978 200:5991 201:1967
202:8685 203:8700 204:4427 205:2556 206:2764 207:2875
208:4061 209:3669 210:2832 211:1540 212:2028 213:1816
214:883 215:87 216:5134 217:1557 218:548 219:316
220:1239 221:527 222:339 223:379

End of report
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