AS21056

==============================================================================================================================

Peering informations:

Operational issues:ipnoc [at] welcomeitalia [dot] it

Spam and abuse issues:ipnoc [at] welcomeitalia [dot] it

IPv4 network: Welcome Italia filters out inbound prefixes longer than /24

IPv6 network: Welcome Italia filters out inbound prefixes longer than /48

Peering requests peering [at] welcomeitalia [dot] it

Others information http://as21056.peeringdb.com/

IPv4 Transit:

IPv6 Transit:

Italian Exchange Point IPv4:

IXP Speed and IP address by Town

MIX -- 60 Gbps -- 217.29.66.43 -- Milan (IT)

NAMEX -- 50 Gbps -- 193.201.28.41 -- Rome (IT)

TIX -- 1 Gbps -- 193.42.140.23 -- Florence (IT)

VSIX -- 1 Gbps -- 95.140.128.70 -- Padova (IT)

European Exchange Point IPv4:

DE-CIX -- 20 Gbps -- 80.81.196.141 -- Frankfurt (DE)

DE-CIX -- 10 Gbps -- 185.1.47.117 -- Marseille (FR)

AMS-IX -- 10 Gbps -- 80.249.214.79 -- Amsterdam (ND)

LINX -- 10 Gbps -- 195.66.231.180 -- London (UK)

FRANCE-IX -- 10 Gbps -- 37.49.238.160 -- Paris (FR)

Private Network Interconnect

Google AS15169 -- 100 Gbps -- Milan (IT)

Customers IPv4:

Customers IPv6:

Communities used to tag inbound routes

21056:65000 Routes received from Customers

21056:65020 Routes received from peers at MIX IXP

21056:65025 Routes received from peers at MIX IXP RS

21056:65030 Routes received from peers at TIX IXP

21056:65040 Routes received from peers at NAMEX IXP

21056:65045 Routes received from peers at NAMEX IXP RS

21056:65050 Routes received from peers at VSIX IXP

21056:65055 Routes received from peers at VSIX IXP RS

21056:65060 Routes received from peers at DECIX IXP

21056:65065 Routes received from peers at DECIX IXP RS

21056:65070 Routes received from peers at AMSIX IXP

21056:65075 Routes received from peers at AMSIX IXP RS

21056:65066 Routes received from peers at DECIX-MARSEILLE IXP

21056:65067 Routes received from peers at DECIX-MARSEILLE RS

21056:65080 Routes received from peers at LINX IXP

21056:65085 Routes received from peers at LINX IXP RS

21056:65090 Routes received from peers at FRANCE-IX IXP

21056:65095 Routes received from peers at FRANCE-IX IXP RS

21056:65100 Routes received from Google PNI (AS15169)

21056:3356 Routes received from Level3 (AS3356)

21056:1299 Routes received from Telia Sonera (AS1299)

21056:6939 Routes received from Hurricane Electric (AS6939)

21056:12874 Routes received from Fastweb (AS12874)

21056:3269 Routes received from Telecom Italia (AS3269)

21056:6762 Routes received from Sparkle (AS6762)

21056:3257 Routes received from GTT (AS3257)

Communities used to control routing announcements

21056:6511x When advertising to Sparkle (AS6762)

21056:6513x When advertising to Telecom Italia (AS3269)

21056:6516x When advertising to GTT (AS3257)

21056:6517x When advertising to Telia Sonera (AS1299)

21056:6518x When advertising to Level3 (AS3356)

21056:6519x When advertising to Fastweb (AS12874)

21056:6520x When advertising to MIX members

21056:6521x When advertising to TIX members

21056:6522x When advertising to NAMEX members

21056:6523x When advertising to VSIX members

21056:6524x When advertising to DECIX members

21056:6525x When advertising to AMSIX members

21056:6526x When advertising to LINX members

21056:6527x When advertising to FRANCE-IX members

21056:6528x When advertising to Google PNI

...x=0 - do not announce

...x=1,2,3,4 - prepend 1,2,3,4 times

...x=9 - set community no-export

21056:65310 Do not announce to upstreams

21056:65320 Do not announce to peers at any IXP

21056:666 Black Hole Community

AS 是什么。自治系统（Autonomous System）是互联网上一张张由单一机构管理的网络，AS 号（ASN）就是它的编号；谁宣告了哪些 IP 段，全球路由表里就记在谁的 AS 号下。

能看出什么。归属地只到城市时，AS 号能进一步说明这段 IP 属于哪家运营商、云厂商或机房 —— 例如 AS37963 是阿里云、AS4134 是中国电信、AS13335 是 Cloudflare。

数据从哪来。按 IANA 的 RDAP bootstrap 找到该号所属的区域注册机构（APNIC / ARIN / RIPE NCC 等），读取其公开的 RDAP 记录；结果会缓存在本站，重复打开不再重复请求。

想查某个 IP 属于哪个 AS，请用 网站 IP 查询 —— 结果页「AS」一行的链接就会跳到这里。