ASN 查詢
查詢 IP 所屬的自治系統與網路組織
8.8.8.8 (Google)
1.1.1.1 (Cloudflare)
208.67.222.222 (OpenDNS)
查詢中...
IP 地址
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ASN
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組織名稱
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ISP
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國家/地區
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IP 範圍
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Frequently Asked Questions
What is an ASN?
An Autonomous System Number identifies a network operated by a single organization. Major ISPs and cloud providers have their own ASNs.
How to find the ASN for an IP?
Enter an IP address in this tool to find its associated ASN and network operator.
Why are ASNs important?
ASNs are fundamental to internet routing (BGP) and help identify network operators and trace traffic paths.
How many ASN numbers exist worldwide?
There are over 100,000 assigned ASNs globally. 16-bit ASNs range from 1-65535, while 32-bit ASNs extend to over 4 billion. IANA allocates ASN blocks to Regional Internet Registries.
Can I find which company owns a specific IP address using ASN lookup?
Yes. Looking up the ASN associated with an IP reveals the organization that operates that network, their network size, upstream providers, and the geographic regions they serve.
什麼是 ASN？
ASN（Autonomous System Number，自治系統編號）是用於識別網際網路上獨立網路的唯一編號。每個 ISP、大型企業或組織通常都有自己的 ASN。
用途：ASN 用於 BGP（邊界閘道協定）路由，幫助網路確定資料封包的最佳傳輸路徑。
範例：AS15169（Google）、AS13335（Cloudflare）、AS32934（Facebook）