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.

Monday, November 19, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 20 Nov, 2012

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

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

BGP routing table entries examined: 432518
Prefixes after maximum aggregation: 180144
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 212768
Total ASes present in the Internet Routing Table: 42625
Prefixes per ASN: 10.15
Origin-only ASes present in the Internet Routing Table: 33830
Origin ASes announcing only one prefix: 15825
Transit ASes present in the Internet Routing Table: 5685
Transit-only ASes present in the Internet Routing Table: 147
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: 1040
Unregistered ASNs in the Routing Table: 377
Number of 32-bit ASNs allocated by the RIRs: 3500
Number of 32-bit ASNs visible in the Routing Table: 3110
Prefixes from 32-bit ASNs in the Routing Table: 8469
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 149
Number of addresses announced to Internet: 2613007244
Equivalent to 155 /8s, 191 /16s and 83 /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: 152074

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

Prefixes being announced by APNIC Region ASes: 104674
Total APNIC prefixes after maximum aggregation: 32661
APNIC Deaggregation factor: 3.20
Prefixes being announced from the APNIC address blocks: 105500
Unique aggregates announced from the APNIC address blocks: 43303
APNIC Region origin ASes present in the Internet Routing Table: 4791
APNIC Prefixes per ASN: 22.02
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 785
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 359
Number of APNIC addresses announced to Internet: 714068416
Equivalent to 42 /8s, 143 /16s and 209 /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: 155345
Total ARIN prefixes after maximum aggregation: 78459
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 156118
Unique aggregates announced from the ARIN address blocks: 70047
ARIN Region origin ASes present in the Internet Routing Table: 15303
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5768
ARIN Region transit ASes present in the Internet Routing Table: 1598
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: 1087398272
Equivalent to 64 /8s, 208 /16s and 97 /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: 110139
Total RIPE prefixes after maximum aggregation: 57898
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 112928
Unique aggregates announced from the RIPE address blocks: 72821
RIPE Region origin ASes present in the Internet Routing Table: 16963
RIPE Prefixes per ASN: 6.66
RIPE Region origin ASes announcing only one prefix: 8148
RIPE Region transit ASes present in the Internet Routing Table: 2745
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: 2016
Number of RIPE addresses announced to Internet: 648603684
Equivalent to 38 /8s, 168 /16s and 232 /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: 44281
Total LACNIC prefixes after maximum aggregation: 8805
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 47808
Unique aggregates announced from the LACNIC address blocks: 22848
LACNIC Region origin ASes present in the Internet Routing Table: 1711
LACNIC Prefixes per ASN: 27.94
LACNIC Region origin ASes announcing only one prefix: 488
LACNIC Region transit ASes present in the Internet Routing Table: 330
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: 712
Number of LACNIC addresses announced to Internet: 119497000
Equivalent to 7 /8s, 31 /16s and 97 /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: 9494
Total AfriNIC prefixes after maximum aggregation: 2267
AfriNIC Deaggregation factor: 4.19
Prefixes being announced from the AfriNIC address blocks: 10015
Unique aggregates announced from the AfriNIC address blocks: 3619
AfriNIC Region origin ASes present in the Internet Routing Table: 568
AfriNIC Prefixes per ASN: 17.63
AfriNIC Region origin ASes announcing only one prefix: 176
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: 43138816
Equivalent to 2 /8s, 146 /16s and 63 /24s
Percentage of available AfriNIC address space announced: 42.9

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 2958 11557 898 Korea Telecom (KIX)
17974 2430 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1791 301 88 TPG Internet Pty Ltd
4755 1615 375 159 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1219 92 530 Sify Limited
7552 1140 1062 11 Vietel Corporation
4808 1127 2057 318 CNCGROUP IP network: China169
24560 1040 385 165 Bharti Airtel Ltd., Telemedia
9498 1021 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 3203 992 191 Windstream Communications Inc
6389 3155 3720 153 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1943 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
20115 1681 1602 633 Charter Communications
4323 1585 1153 392 Time Warner Telecom
30036 1363 284 766 Mediacom Communications Corp
7018 1278 10276 853 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 1763 544 16 Corbina telecom
12479 854 777 64 Uni2 Autonomous System
34984 840 210 207 BILISIM TELEKOM
31148 731 37 9 FreeNet ISP
13188 728 94 127 Educational Network
6830 712 2313 435 UPC Distribution Services
20940 709 228 547 Akamai Technologies European
2118 691 97 14 EUnet/RELCOM Autonomous Syste
58113 602 67 365 LIR DATACENTER TELECOM SRL
8551 596 364 61 Bezeq International

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 2168 1285 65 NET Servicos de Comunicao S.A
7303 1668 1138 201 Telecom Argentina Stet-France
8151 1603 3044 356 UniNet S.A. de C.V.
6503 1537 435 68 AVANTEL, S.A.
27947 749 77 93 Telconet S.A
3816 655 309 69 Empresa Nacional de Telecomun
11172 600 85 68 Servicios Alestra S.A de C.V
18881 587 716 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 868 274 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 528 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 289 80 8 RAYA Telecom - Egypt
3741 268 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
29975 191 667 21 Vodacom
15706 190 32 6 Sudatel Internet Exchange Aut
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 3203 992 191 Windstream Communications Inc
6389 3155 3720 153 bellsouth.net, inc.
4766 2958 11557 898 Korea Telecom (KIX)
17974 2430 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2260 386 205 TVCABLE BOGOTA
28573 2168 1285 65 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1943 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
7545 1791 301 88 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 3155 3002 bellsouth.net, inc.
17974 2430 2384 PT TELEKOMUNIKASI INDONESIA
28573 2168 2103 NET Servicos de Comunicao S.A
4766 2958 2060 Korea Telecom (KIX)
10620 2260 2055 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1943 1814 Cox Communications, Inc.
1785 1931 1805 PaeTec Communications, Inc.
8402 1763 1747 Corbina telecom
7545 1791 1703 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
/13:479 /14:851 /15:1553 /16:12436 /17:6540 /18:10887
/19:21367 /20:30762 /21:32847 /22:43464 /23:40480 /24:226200
/25:1362 /26:1698 /27:904 /28:178 /29:79 /30:17
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2642 3203 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1783 3155 bellsouth.net, inc.
8402 1486 1763 Corbina telecom
30036 1279 1363 Mediacom Communications Corp
22773 1273 1943 Cox Communications, Inc.
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)
----------------------------------------------

1:645 2:774 3:1 4:13 5:636 6:3
8:482 12:1959 13:3 14:696 15:11 16:3
17:6 20:27 23:213 24:1777 27:1415 31:1280
32:54 33:2 34:2 36:7 37:1043 38:844
39:2 40:139 41:2588 42:179 44:3 46:1660
47:2 49:498 50:606 52:12 54:27 55:3
57:28 58:1058 59:542 60:236 61:1287 62:925
63:2024 64:4333 65:2200 66:4512 67:2103 68:1162
69:3230 70:931 71:556 72:1895 74:2617 75:483
76:300 77:978 78:994 79:504 80:1226 81:984
82:621 83:536 84:522 85:1147 86:516 87:959
88:348 89:1750 90:305 91:5336 92:586 93:1541
94:1804 95:1404 96:413 97:323 98:968 99:40
100:31 101:293 103:1806 105:521 106:119 107:203
108:480 109:1643 110:834 111:979 112:436 113:735
114:682 115:892 116:888 117:766 118:952 119:1253
120:363 121:671 122:1729 123:1168 124:1334 125:1284
128:554 129:201 130:292 131:664 132:315 133:143
134:256 135:62 136:212 137:239 138:339 139:177
140:503 141:292 142:498 143:363 144:491 145:84
146:527 147:266 148:737 149:328 150:155 151:218
152:450 153:183 154:21 155:432 156:229 157:370
158:279 159:670 160:337 161:414 162:370 163:190
164:581 165:447 166:478 167:561 168:973 169:130
170:922 171:148 172:7 173:1700 174:640 175:455
176:729 177:1455 178:1663 180:1385 181:172 182:1097
183:302 184:631 185:74 186:2062 187:1391 188:1770
189:1601 190:5796 192:6050 193:5412 194:4285 195:3665
196:1243 197:266 198:3944 199:5106 200:6018 201:1973
202:8815 203:8711 204:4427 205:2534 206:2766 207:2815
208:4087 209:3614 210:2886 211:1532 212:2125 213:1854
214:870 215:75 216:5180 217:1585 218:578 219:311
220:1260 221:530 222:337 223:411

End of report
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