BGPプレフィックス検索
プレフィックス（または単一のアドレス）を入力してください。世界のルーティングテーブルを毎日複製したデータから回答します。
2.18.232.0/22
完全一致で広報
- 2.18.232.0/22AS16625Akamai Technologies, Inc.RPKI 有効2.18.232.0
- レジストリ
- RIPE NCC · オランダ · 2010/09/10
- 割り振りブロック
- 2.16.0.0 – 2.23.255.255
包含する経路
- 2.16.0.0/13AS20940Akamai International B.V.RPKI 有効2.16.0.0
より詳細な経路
より詳細な経路はありません。
このテキストはまだ日本語で提供されていません。翻訳が公開されるまで英語で表示しています。
On the internet, routes are announced as prefixes: an autonomous system tells its neighbours via BGP that it can deliver traffic for, say, 144.122.0.0/16 (Middle East Technical University, AS1967). This tool looks a prefix up in our daily copy of the global routing table and shows three things:
- Exact announcements: which AS originates exactly this prefix. More than one origin (a MOAS) is normal for anycast services and some multihomed networks, and suspicious otherwise.
- Covering routes: less-specific announcements that contain it. Traffic follows the most specific route, so a covering route matters if the more-specific one disappears.
- More-specifics: announcements inside it, which may belong to other networks (customers, or a hijack).
Each announced route is also checked against the RPKI: whether a ROA authorises its origin AS.
The table is the view from APNIC’s route collector. Most of the global table is the same from everywhere, but a route that is filtered before it reaches that collector will not appear.
よくある質問
Why is my /24 not listed but a /16 is?
Your addresses are announced as part of the larger block, and no one announces the /24 separately. That is the normal case for most customers of a provider.
What is a more-specific hijack?
Someone announces a longer prefix inside your space. Because routers prefer the most specific route, traffic goes to them. RPKI with a strict max length makes such announcements invalid.
Can I enter a single address?
Yes. The tool then shows the most specific announced route that contains it.