AS8473（BAHNHOF） AS 注册信息

Handle	AS8473
名称	BAHNHOF
注册机构	BAHNHOF-NCC
ASN 范围	AS8473
注册时间	2001-12-10 13:09 UTC
更新时间	2022-09-01 09:09 UTC
状态	active
管理联系人	Bahnhof DBM Bahnhof AB Tunnelgatan 2 111 37 Stockholm Sweden
技术联系人	Bahnhof DBM Bahnhof AB Tunnelgatan 2 111 37 Stockholm Sweden
滥用投诉	Abuse-C Role [email protected] Bahnhof AB Tunnelgatan 2 111 37 Stockholm Sweden
注册局 WHOIS	whois.ripe.net
注册局 RDAP	https://rdap.db.ripe.net/autnum/8473

注册机构备注

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Bahnhof - AS8473:

Please see https://as8473.peeringdb.com for

IXPs and facilities where we are present.

BGP Graceful Shutdown (RFC8326): Supported

RPKI Invalids (RFC8481): Dropped

Customer MEDs: Honored

Peer MEDs: Ignored

AS-set announced: AS-BAHNHOF

Control section:

BGP Community support for AS8473 customers:

8473:1050 Set local pref 50 (lowest preference)

8473:1100 Set local pref 100 (transit preference)

8473:1150 Set local pref 150 (backup peer preference)

8473:1200 Set local pref 200 (peer preference)

8473:1250 Set local pref 250 (backup downstream preference)

(Default) local pref 300

8473:2000 Do not announce to transits

8473:2001 Announce to transits prepend x1

8473:2002 Announce to transits prepend x2

8473:2003 Announce to transits prepend x3

8473:2005 Announce to transits with no-export

8473:3000 Do not announce to peers

8473:3001 Announce to peers prepend x1

8473:3002 Announce to peers prepend x2

8473:3003 Announce to peers prepend x3

8473:3005 Announce to peers with no-export

8473:999 Blackhole community

Contact:

Bahnhof applies selective peering

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。