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, July 9, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 10 Jul, 2013

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

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

BGP routing table entries examined: 458411
Prefixes after maximum aggregation: 186396
Deaggregation factor: 2.46
Unique aggregates announced to Internet: 227606
Total ASes present in the Internet Routing Table: 44442
Prefixes per ASN: 10.31
Origin-only ASes present in the Internet Routing Table: 34796
Origin ASes announcing only one prefix: 16158
Transit ASes present in the Internet Routing Table: 5880
Transit-only ASes present in the Internet Routing Table: 146
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 2428
Unregistered ASNs in the Routing Table: 1059
Number of 32-bit ASNs allocated by the RIRs: 4858
Number of 32-bit ASNs visible in the Routing Table: 3766
Prefixes from 32-bit ASNs in the Routing Table: 11187
Special use prefixes present in the Routing Table: 26
Prefixes being announced from unallocated address space: 232
Number of addresses announced to Internet: 2627779372
Equivalent to 156 /8s, 160 /16s and 187 /24s
Percentage of available address space announced: 71.0
Percentage of allocated address space announced: 71.0
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.7
Total number of prefixes smaller than registry allocations: 160756

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

Prefixes being announced by APNIC Region ASes: 109791
Total APNIC prefixes after maximum aggregation: 33714
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 111690
Unique aggregates announced from the APNIC address blocks: 45996
APNIC Region origin ASes present in the Internet Routing Table: 4853
APNIC Prefixes per ASN: 23.01
APNIC Region origin ASes announcing only one prefix: 1211
APNIC Region transit ASes present in the Internet Routing Table: 827
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 600
Number of APNIC addresses announced to Internet: 725636064
Equivalent to 43 /8s, 64 /16s and 83 /24s
Percentage of available APNIC address space announced: 84.8

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: 159083
Total ARIN prefixes after maximum aggregation: 80473
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159697
Unique aggregates announced from the ARIN address blocks: 73868
ARIN Region origin ASes present in the Internet Routing Table: 15755
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5993
ARIN Region transit ASes present in the Internet Routing Table: 1642
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 19
Number of ARIN addresses announced to Internet: 1065593920
Equivalent to 63 /8s, 131 /16s and 172 /24s
Percentage of available ARIN address space announced: 56.4

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: 118331
Total RIPE prefixes after maximum aggregation: 60276
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 121794
Unique aggregates announced from the RIPE address blocks: 78604
RIPE Region origin ASes present in the Internet Routing Table: 17272
RIPE Prefixes per ASN: 7.05
RIPE Region origin ASes announcing only one prefix: 8183
RIPE Region transit ASes present in the Internet Routing Table: 2826
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2374
Number of RIPE addresses announced to Internet: 656673124
Equivalent to 39 /8s, 36 /16s and 9 /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: 48935
Total LACNIC prefixes after maximum aggregation: 9366
LACNIC Deaggregation factor: 5.22
Prefixes being announced from the LACNIC address blocks: 53392
Unique aggregates announced from the LACNIC address blocks: 24957
LACNIC Region origin ASes present in the Internet Routing Table: 1974
LACNIC Prefixes per ASN: 27.05
LACNIC Region origin ASes announcing only one prefix: 581
LACNIC Region transit ASes present in the Internet Routing Table: 360
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 767
Number of LACNIC addresses announced to Internet: 133267624
Equivalent to 7 /8s, 241 /16s and 128 /24s
Percentage of available LACNIC address space announced: 79.4

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: 10994
Total AfriNIC prefixes after maximum aggregation: 2526
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 11606
Unique aggregates announced from the AfriNIC address blocks: 3967
AfriNIC Region origin ASes present in the Internet Routing Table: 648
AfriNIC Prefixes per ASN: 17.91
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 135
Average AfriNIC Region AS path length visible: 4.8
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: 46273280
Equivalent to 2 /8s, 194 /16s and 19 /24s
Percentage of available AfriNIC address space announced: 46.0

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 2937 11561 920 Korea Telecom (KIX)
17974 2572 855 92 PT TELEKOMUNIKASI INDONESIA
7545 2027 320 109 TPG Internet Pty Ltd
4755 1754 391 192 TATA Communications formerly
9829 1531 1220 44 BSNL National Internet Backbo
9583 1463 117 564 Sify Limited
4808 1173 2151 340 CNCGROUP IP network: China169
7552 1159 1080 13 Vietel Corporation
9498 1151 309 71 BHARTI Airtel Ltd.
24560 1082 394 164 Bharti Airtel Ltd., Telemedia

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
6389 2989 3691 69 bellsouth.net, inc.
18566 2066 382 184 Covad Communications
1785 1999 678 126 PaeTec Communications, Inc.
22773 1991 2927 123 Cox Communications, Inc.
20115 1667 1618 620 Charter Communications
4323 1619 1133 402 Time Warner Telecom
701 1531 11127 798 UUNET Technologies, Inc.
30036 1339 300 660 Mediacom Communications Corp
7018 1299 11035 821 AT&T WorldNet Services
11492 1224 218 360 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 1645 544 16 Corbina telecom
34984 1285 244 222 BILISIM TELEKOM
2118 1271 97 13 EUnet/RELCOM Autonomous Syste
20940 901 312 709 Akamai Technologies European
13188 836 98 80 Educational Network
31148 808 40 25 FreeNet ISP
6830 783 2375 440 UPC Distribution Services
8551 780 370 45 Bezeq International
12479 674 789 57 Uni2 Autonomous System
34744 656 171 76 SC GVM SISTEM 2003 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 2919 1582 107 NET Servicos de Comunicao S.A
10620 2687 422 188 TVCABLE BOGOTA
7303 1732 1155 221 Telecom Argentina Stet-France
8151 1273 2747 386 UniNet S.A. de C.V.
18881 1117 844 20 Global Village Telecom
6503 864 434 63 AVANTEL, S.A.
27947 825 94 91 Telconet S.A
3816 718 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
11172 620 88 66 Servicios Alestra S.A de C.V

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
36998 1298 80 4 MOBITEL
24863 838 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 445 956 9 TEDATA
24835 345 80 8 RAYA Telecom - Egypt
3741 259 922 218 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
29571 219 17 12 Ci Telecom Autonomous system
36992 205 527 22 Etisalat MISR
12258 194 28 67 Vodacom Internet Company

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
6389 2989 3691 69 bellsouth.net, inc.
4766 2937 11561 920 Korea Telecom (KIX)
28573 2919 1582 107 NET Servicos de Comunicao S.A
10620 2687 422 188 TVCABLE BOGOTA
17974 2572 855 92 PT TELEKOMUNIKASI INDONESIA
18566 2066 382 184 Covad Communications
7545 2027 320 109 TPG Internet Pty Ltd
1785 1999 678 126 PaeTec Communications, Inc.
22773 1991 2927 123 Cox Communications, Inc.
4755 1754 391 192 TATA Communications formerly

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

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

ASN No of nets Net Savings Description
28573 2919 2812 NET Servicos de Comunicao S.A
10620 2687 2499 TVCABLE BOGOTA
17974 2572 2480 PT TELEKOMUNIKASI INDONESIA
4766 2937 2017 Korea Telecom (KIX)
7545 2027 1918 TPG Internet Pty Ltd
18566 2066 1882 Covad Communications
1785 1999 1873 PaeTec Communications, Inc.
22773 1991 1868 Cox Communications, Inc.
8402 1645 1629 Corbina telecom
4755 1754 1562 TATA Communications formerly

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

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

Bad AS Designation Network Transit AS Description
59628 UNALLOCATED 5.200.128.0/17 48159 Telecommunication In
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.42.0/24 60619 >>UNKNOWN<<
128.0.43.0/24 60619 >>UNKNOWN<<
128.0.46.0/23 39743 Mobimax Telecom SRL
128.0.53.0/24 60993 Totalsoft SA
128.0.54.0/24 60972 Carpatair SA
128.0.55.0/24 48571 SC efectRO SRL
128.0.57.0/24 60993 Totalsoft SA

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

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

Network Origin AS Description
5.200.128.0/17 59628 >>UNKNOWN<<
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
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.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.
64.185.230.0/24 27431 JTL Networks Inc.

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 /8:16 /9:11 /10:30 /11:92 /12:250
/13:482 /14:899 /15:1603 /16:12718 /17:6654 /18:11095
/19:22517 /20:32117 /21:34468 /22:48175 /23:42494 /24:240977
/25:1279 /26:1530 /27:859 /28:43 /29:68 /30:18
/31:0 /32:16

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

ASN No of nets Total ann. Description
18566 2017 2066 Covad Communications
6389 1717 2989 bellsouth.net, inc.
8402 1344 1645 Corbina telecom
22773 1295 1991 Cox Communications, Inc.
36998 1266 1298 MOBITEL
30036 1207 1339 Mediacom Communications Corp
11492 1185 1224 Cable One
1785 1067 1999 PaeTec Communications, Inc.
6983 1015 1144 ITC^Deltacom
10620 1000 2687 TVCABLE BOGOTA

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

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

1:846 2:743 3:3 4:19 5:813 6:16
8:561 12:1914 13:3 14:864 15:11 16:3
17:10 20:17 23:295 24:1771 27:1476 31:1318
32:45 33:2 34:5 36:52 37:1863 38:878
39:2 40:171 41:2784 42:225 44:8 46:1948
47:2 49:666 50:752 52:12 54:35 55:3
57:26 58:1157 59:583 60:328 61:1404 62:1119
63:2010 64:4342 65:2159 66:4176 67:2034 68:1076
69:3287 70:832 71:491 72:1942 74:2465 75:324
76:308 77:1141 78:1011 79:614 80:1256 81:1015
82:632 83:582 84:588 85:1188 86:458 87:1016
88:545 89:1770 90:149 91:5532 92:617 93:1780
94:1935 95:1686 96:523 97:343 98:1025 99:42
100:30 101:340 103:2929 105:519 106:138 107:206
108:514 109:1859 110:916 111:1064 112:548 113:815
114:691 115:968 116:968 117:803 118:1097 119:1317
120:384 121:735 122:1803 123:1221 124:1376 125:1383
128:635 129:223 130:302 131:668 132:360 133:155
134:269 135:68 136:255 137:242 138:342 139:190
140:211 141:326 142:535 143:388 144:503 145:98
146:510 147:390 148:671 149:352 150:148 151:520
152:417 153:189 154:28 155:415 156:264 157:398
158:279 159:720 160:344 161:453 162:477 163:221
164:579 165:500 166:254 167:595 168:1027 169:129
170:1060 171:181 172:23 173:1596 174:544 175:477
176:1154 177:2119 178:1870 179:62 180:1464 181:505
182:1256 183:422 184:667 185:623 186:2307 187:1310
188:2073 189:1288 190:6784 192:6844 193:5849 194:4622
195:3462 196:1362 197:939 198:4506 199:5347 200:6021
201:2216 202:8816 203:8889 204:4510 205:2564 206:2809
207:2848 208:4020 209:3597 210:2920 211:1520 212:2188
213:1990 214:910 215:99 216:5254 217:1617 218:622
219:321 220:1281 221:557 222:321 223:450

End of report
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