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, November 21, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 22 Nov, 2012

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

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

BGP routing table entries examined: 432829
Prefixes after maximum aggregation: 180153
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 212576
Total ASes present in the Internet Routing Table: 42663
Prefixes per ASN: 10.15
Origin-only ASes present in the Internet Routing Table: 33853
Origin ASes announcing only one prefix: 15834
Transit ASes present in the Internet Routing Table: 5685
Transit-only ASes present in the Internet Routing Table: 143
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 1057
Unregistered ASNs in the Routing Table: 385
Number of 32-bit ASNs allocated by the RIRs: 3507
Number of 32-bit ASNs visible in the Routing Table: 3125
Prefixes from 32-bit ASNs in the Routing Table: 8505
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 159
Number of addresses announced to Internet: 2613466508
Equivalent to 155 /8s, 198 /16s and 85 /24s
Percentage of available address space announced: 70.6
Percentage of allocated address space announced: 70.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.9
Total number of prefixes smaller than registry allocations: 152491

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

Prefixes being announced by APNIC Region ASes: 104533
Total APNIC prefixes after maximum aggregation: 32616
APNIC Deaggregation factor: 3.20
Prefixes being announced from the APNIC address blocks: 105373
Unique aggregates announced from the APNIC address blocks: 43128
APNIC Region origin ASes present in the Internet Routing Table: 4794
APNIC Prefixes per ASN: 21.98
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 781
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: 364
Number of APNIC addresses announced to Internet: 714509248
Equivalent to 42 /8s, 150 /16s and 139 /24s
Percentage of available APNIC address space announced: 83.5

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: 155369
Total ARIN prefixes after maximum aggregation: 78470
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 156141
Unique aggregates announced from the ARIN address blocks: 70140
ARIN Region origin ASes present in the Internet Routing Table: 15307
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5775
ARIN Region transit ASes present in the Internet Routing Table: 1601
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087374464
Equivalent to 64 /8s, 208 /16s and 4 /24s
Percentage of available ARIN address space announced: 57.5

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: 110395
Total RIPE prefixes after maximum aggregation: 57913
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 113204
Unique aggregates announced from the RIPE address blocks: 72852
RIPE Region origin ASes present in the Internet Routing Table: 16974
RIPE Prefixes per ASN: 6.67
RIPE Region origin ASes announcing only one prefix: 8151
RIPE Region transit ASes present in the Internet Routing Table: 2758
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2027
Number of RIPE addresses announced to Internet: 648786724
Equivalent to 38 /8s, 171 /16s and 179 /24s
Percentage of available RIPE address space announced: 94.3

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: 44370
Total LACNIC prefixes after maximum aggregation: 8837
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 47898
Unique aggregates announced from the LACNIC address blocks: 22803
LACNIC Region origin ASes present in the Internet Routing Table: 1715
LACNIC Prefixes per ASN: 27.93
LACNIC Region origin ASes announcing only one prefix: 488
LACNIC Region transit ASes present in the Internet Routing Table: 327
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 711
Number of LACNIC addresses announced to Internet: 119509544
Equivalent to 7 /8s, 31 /16s and 146 /24s
Percentage of available LACNIC address space announced: 71.2

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: 9535
Total AfriNIC prefixes after maximum aggregation: 2258
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 10054
Unique aggregates announced from the AfriNIC address blocks: 3513
AfriNIC Region origin ASes present in the Internet Routing Table: 572
AfriNIC Prefixes per ASN: 17.58
AfriNIC Region origin ASes announcing only one prefix: 178
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 42975232
Equivalent to 2 /8s, 143 /16s and 192 /24s
Percentage of available AfriNIC address space announced: 42.7

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 2953 11557 898 Korea Telecom (KIX)
17974 2431 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1794 301 87 TPG Internet Pty Ltd
4755 1622 374 158 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1183 88 503 Sify Limited
7552 1140 1062 11 Vietel Corporation
4808 1126 2056 317 CNCGROUP IP network: China169
24560 1040 385 165 Bharti Airtel Ltd., Telemedia
9498 1023 310 74 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 3202 992 191 Windstream Communications Inc
6389 3152 3720 151 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1945 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
20115 1678 1600 634 Charter Communications
4323 1588 1153 393 Time Warner Telecom
30036 1361 280 752 Mediacom Communications Corp
7018 1282 10276 851 AT&T WorldNet Services
7011 1222 334 692 Citizens Utilities

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 1784 544 16 Corbina telecom
12479 854 777 64 Uni2 Autonomous System
34984 842 210 208 BILISIM TELEKOM
13188 732 94 130 Educational Network
31148 731 37 9 FreeNet ISP
6830 716 2313 435 UPC Distribution Services
20940 710 228 548 Akamai Technologies European
58113 602 67 365 LIR DATACENTER TELECOM SRL
8551 596 365 57 Bezeq International
2118 595 97 14 EUnet/RELCOM Autonomous Syste

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
10620 2260 386 205 TVCABLE BOGOTA
28573 2156 1285 66 NET Servicos de Comunicao S.A
7303 1668 1138 201 Telecom Argentina Stet-France
8151 1605 3046 356 UniNet S.A. de C.V.
6503 1537 435 67 AVANTEL, S.A.
27947 752 77 93 Telconet S.A
3816 658 309 69 Empresa Nacional de Telecomun
11172 603 85 68 Servicios Alestra S.A de C.V
18881 594 716 18 Global Village Telecom
22047 579 326 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 871 274 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
6713 518 666 20 Itissalat Al-MAGHRIB
8452 506 958 13 TEDATA
24835 289 80 8 RAYA Telecom - Egypt
3741 268 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 181 697 88 MTN Network Solutions

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 3202 992 191 Windstream Communications Inc
6389 3152 3720 151 bellsouth.net, inc.
4766 2953 11557 898 Korea Telecom (KIX)
17974 2431 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2260 386 205 TVCABLE BOGOTA
28573 2156 1285 66 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1945 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
7545 1794 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 3152 3001 bellsouth.net, inc.
17974 2431 2385 PT TELEKOMUNIKASI INDONESIA
28573 2156 2090 NET Servicos de Comunicao S.A
4766 2953 2055 Korea Telecom (KIX)
10620 2260 2055 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1945 1816 Cox Communications, Inc.
1785 1931 1805 PaeTec Communications, Inc.
8402 1784 1768 Corbina telecom
7545 1794 1707 TPG Internet Pty Ltd

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

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

Bad AS Designation Network Transit AS Description
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59530 UNALLOCATED 5.8.182.0/24 31261 GARS Telecom
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
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

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
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<

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

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
41.222.80.0/21 37110 Moztel LDA

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 /9:13 /10:29 /11:88 /12:243
/13:478 /14:853 /15:1553 /16:12428 /17:6548 /18:10878
/19:21398 /20:30784 /21:32821 /22:43545 /23:40511 /24:226369
/25:1361 /26:1708 /27:903 /28:180 /29:79 /30:17
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2641 3202 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1782 3152 bellsouth.net, inc.
8402 1502 1784 Corbina telecom
22773 1275 1945 Cox Communications, Inc.
30036 1275 1361 Mediacom Communications Corp
11492 1145 1180 Cable One
6503 1054 1537 AVANTEL, S.A.
1785 1016 1931 PaeTec Communications, Inc.
7011 957 1222 Citizens Utilities

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

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

1:646 2:777 3:1 4:13 5:642 6:3
8:486 12:1958 13:3 14:694 15:11 16:3
17:6 20:27 23:213 24:1778 27:1413 31:1280
32:54 33:2 34:2 36:7 37:1056 38:843
39:2 40:140 41:2599 42:179 44:3 46:1663
47:2 49:511 50:607 52:12 54:27 55:4
57:28 58:1060 59:548 60:235 61:1284 62:1027
63:2021 64:4337 65:2199 66:4508 67:2102 68:1160
69:3231 70:929 71:556 72:1895 74:2617 75:483
76:300 77:993 78:1012 79:507 80:1233 81:984
82:623 83:538 84:523 85:1161 86:513 87:957
88:350 89:1727 90:305 91:5347 92:588 93:1551
94:1811 95:1415 96:409 97:322 98:973 99:40
100:31 101:290 103:1813 105:514 106:119 107:203
108:480 109:1651 110:808 111:979 112:438 113:718
114:682 115:894 116:884 117:764 118:957 119:1245
120:360 121:677 122:1739 123:1169 124:1330 125:1285
128:561 129:201 130:294 131:663 132:314 133:143
134:256 135:62 136:217 137:239 138:338 139:176
140:506 141:289 142:498 143:364 144:484 145:85
146:530 147:266 148:739 149:330 150:148 151:219
152:450 153:183 154:22 155:434 156:226 157:369
158:278 159:669 160:337 161:414 162:370 163:191
164:581 165:452 166:478 167:559 168:974 169:130
170:922 171:148 172:7 173:1708 174:644 175:454
176:737 177:1467 178:1675 180:1384 181:173 182:1112
183:301 184:631 185:85 186:2041 187:1406 188:1762
189:1590 190:5845 192:6043 193:5421 194:4262 195:3591
196:1241 197:268 198:3946 199:5112 200:6004 201:1977
202:8780 203:8697 204:4434 205:2539 206:2764 207:2813
208:4079 209:3614 210:2876 211:1525 212:2125 213:1866
214:869 215:75 216:5200 217:1589 218:579 219:311
220:1257 221:531 222:337 223:414

End of report
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