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, September 25, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 26 Sep, 2012

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

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

BGP routing table entries examined: 428231
Prefixes after maximum aggregation: 178691
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 209149
Total ASes present in the Internet Routing Table: 42204
Prefixes per ASN: 10.15
Origin-only ASes present in the Internet Routing Table: 33672
Origin ASes announcing only one prefix: 15780
Transit ASes present in the Internet Routing Table: 5614
Transit-only ASes present in the Internet Routing Table: 138
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: 765
Unregistered ASNs in the Routing Table: 275
Number of 32-bit ASNs allocated by the RIRs: 3321
Number of 32-bit ASNs visible in the Routing Table: 2918
Prefixes from 32-bit ASNs in the Routing Table: 7839
Special use prefixes present in the Routing Table: 10
Prefixes being announced from unallocated address space: 167
Number of addresses announced to Internet: 2599040300
Equivalent to 154 /8s, 234 /16s and 53 /24s
Percentage of available address space announced: 70.2
Percentage of allocated address space announced: 70.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.7
Total number of prefixes smaller than registry allocations: 151110

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

Prefixes being announced by APNIC Region ASes: 102841
Total APNIC prefixes after maximum aggregation: 32550
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103502
Unique aggregates announced from the APNIC address blocks: 42769
APNIC Region origin ASes present in the Internet Routing Table: 4759
APNIC Prefixes per ASN: 21.75
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 768
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: 318
Number of APNIC addresses announced to Internet: 708418464
Equivalent to 42 /8s, 57 /16s and 155 /24s
Percentage of available APNIC address space announced: 82.8

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: 154507
Total ARIN prefixes after maximum aggregation: 78195
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155438
Unique aggregates announced from the ARIN address blocks: 69122
ARIN Region origin ASes present in the Internet Routing Table: 15254
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5766
ARIN Region transit ASes present in the Internet Routing Table: 1586
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: 1084887936
Equivalent to 64 /8s, 170 /16s and 19 /24s
Percentage of available ARIN address space announced: 57.4

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, 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: 109221
Total RIPE prefixes after maximum aggregation: 57170
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 111756
Unique aggregates announced from the RIPE address blocks: 71274
RIPE Region origin ASes present in the Internet Routing Table: 16886
RIPE Prefixes per ASN: 6.62
RIPE Region origin ASes announcing only one prefix: 8155
RIPE Region transit ASes present in the Internet Routing Table: 2724
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: 1893
Number of RIPE addresses announced to Internet: 646929124
Equivalent to 38 /8s, 143 /16s and 90 /24s
Percentage of available RIPE address space announced: 94.0

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: 43822
Total LACNIC prefixes after maximum aggregation: 8495
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 47021
Unique aggregates announced from the LACNIC address blocks: 22330
LACNIC Region origin ASes present in the Internet Routing Table: 1650
LACNIC Prefixes per ASN: 28.50
LACNIC Region origin ASes announcing only one prefix: 444
LACNIC Region transit ASes present in the Internet Routing Table: 319
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: 684
Number of LACNIC addresses announced to Internet: 116652072
Equivalent to 6 /8s, 243 /16s and 248 /24s
Percentage of available LACNIC address space announced: 69.5

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: 9877
Total AfriNIC prefixes after maximum aggregation: 2224
AfriNIC Deaggregation factor: 4.44
Prefixes being announced from the AfriNIC address blocks: 10347
Unique aggregates announced from the AfriNIC address blocks: 3516
AfriNIC Region origin ASes present in the Internet Routing Table: 566
AfriNIC Prefixes per ASN: 18.28
AfriNIC Region origin ASes announcing only one prefix: 176
AfriNIC Region transit ASes present in the Internet Routing Table: 128
Average AfriNIC Region AS path length visible: 4.6
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: 41868032
Equivalent to 2 /8s, 126 /16s and 219 /24s
Percentage of available AfriNIC address space announced: 41.6

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 2977 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1762 301 87 TPG Internet Pty Ltd
4755 1620 387 162 TATA Communications formerly
9829 1335 1106 41 BSNL National Internet Backbo
9583 1185 88 516 Sify Limited
7552 1137 1062 11 Vietel Corporation
4808 1116 2044 316 CNCGROUP IP network: China169
24560 1041 386 160 Bharti Airtel Ltd., Telemedia
18101 1016 135 169 Reliance Infocom Ltd Internet

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 3305 3732 185 bellsouth.net, inc.
7029 3164 990 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1917 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
20115 1662 1580 614 Charter Communications
4323 1575 1153 386 Time Warner Telecom
30036 1387 275 732 Mediacom Communications Corp
7018 1247 10319 831 AT&T WorldNet Services
7011 1204 329 698 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 1734 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
15557 1237 2247 55 LDCOM NETWORKS
12479 846 775 74 Uni2 Autonomous System
34984 771 205 180 BILISIM TELEKOM
6830 724 2313 448 UPC Distribution Services
31148 709 37 9 FreeNet ISP
20940 701 222 545 Akamai Technologies European
13188 691 91 157 Educational Network
58113 631 70 366 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
10620 2164 370 219 TVCABLE BOGOTA
28573 2139 1251 56 NET Servicos de Comunicao S.A
8151 1586 3045 346 UniNet S.A. de C.V.
7303 1564 1034 200 Telecom Argentina Stet-France
6503 1536 435 68 AVANTEL, S.A.
27947 724 74 91 Telconet S.A
3816 642 309 53 Empresa Nacional de Telecomun
6458 631 81 15 GUATEL
11172 593 85 69 Servicios Alestra S.A de C.V
14420 587 86 101 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 888 275 36 LINKdotNET AS number
8452 783 958 13 TEDATA
36998 772 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 264 904 224 The Internet Solution
33776 229 13 11 Starcomms Nigeria Limited
12258 194 28 66 Vodacom Internet Company
15706 192 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
6389 3305 3732 185 bellsouth.net, inc.
7029 3164 990 161 Windstream Communications Inc
4766 2977 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2164 370 219 TVCABLE BOGOTA
28573 2139 1251 56 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1917 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
7545 1762 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
7029 3164 3003 Windstream Communications Inc
17974 2355 2301 PT TELEKOMUNIKASI INDONESIA
28573 2139 2083 NET Servicos de Comunicao S.A
4766 2977 2075 Korea Telecom (KIX)
10620 2164 1945 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1917 1789 PaeTec Communications, Inc.
22773 1887 1759 Cox Communications, Inc.
8402 1734 1718 Corbina telecom
7545 1762 1675 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
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 5.149.64.0/19 35567 DASTO semtel d.o.o.

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

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

Prefix Origin AS Description
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.80.0/20 52041 Timer LTD
128.0.144.0/21 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev
128.0.170.0/24 24685 ISP Elencom autonomous system
128.0.176.0/20 30764 PODA s.r.o.
128.0.192.0/21 51483 SaSG GmbH & Co. KG

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
41.220.80.0/24 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 /11:86 /12:240
/13:477 /14:846 /15:1546 /16:12407 /17:6472 /18:10869
/19:21102 /20:30318 /21:32266 /22:42648 /23:40068 /24:224553
/25:1394 /26:1674 /27:924 /28:175 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2647 3164 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1840 3305 bellsouth.net, inc.
8402 1443 1734 Corbina telecom
30036 1321 1387 Mediacom Communications Corp
22773 1229 1887 Cox Communications, Inc.
15557 1175 1237 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1054 1536 AVANTEL, S.A.
1785 1016 1917 PaeTec Communications, Inc.

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

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

1:626 2:681 3:1 4:13 5:516 6:3
8:461 12:1985 13:1 14:668 15:11 16:3
17:6 20:27 23:204 24:1791 27:1337 31:1014
32:54 33:2 34:2 36:7 37:800 38:830
39:2 40:133 41:3087 42:159 44:3 46:1598
47:2 49:481 50:599 52:13 54:21 55:9
56:1 57:30 58:992 59:542 60:238 61:1290
62:990 63:1987 64:4265 65:2241 66:4506 67:2048
68:1167 69:3233 70:986 71:511 72:1874 74:2598
75:485 76:314 77:967 78:950 79:495 80:1271
81:971 82:634 83:530 84:626 85:1158 86:820
87:926 88:363 89:1804 90:303 91:5228 92:598
93:1551 94:1626 95:1218 96:418 97:322 98:977
99:39 100:23 101:262 103:1562 105:512 106:118
107:198 108:461 109:1946 110:806 111:969 112:451
113:713 114:626 115:881 116:890 117:734 118:952
119:1224 120:308 121:690 122:1621 123:1169 124:1328
125:1271 128:566 129:185 130:281 131:634 132:310
133:22 134:251 135:61 136:219 137:239 138:337
139:171 140:498 141:282 142:485 143:392 144:490
145:81 146:517 147:263 148:750 149:325 150:155
151:193 152:449 153:178 154:20 155:421 156:224
157:373 158:259 159:657 160:343 161:412 162:363
163:191 164:693 165:421 166:529 167:553 168:963
169:126 170:907 171:165 172:5 173:1686 174:625
175:443 176:788 177:1222 178:1610 180:1364 181:136
182:1053 183:295 184:600 185:6 186:2184 187:1269
188:1698 189:1579 190:6000 192:6038 193:5723 194:4558
195:3493 196:1224 197:220 198:3817 199:5027 200:6002
201:1975 202:8722 203:8723 204:4423 205:2543 206:2761
207:2853 208:4066 209:3663 210:2852 211:1534 212:1994
213:1824 214:872 215:87 216:5121 217:1548 218:572
219:315 220:1251 221:535 222:336 223:406

End of report
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