Network5 options compared

BGP AS Lookup

Resolves Border Gateway Protocol (BGP) Autonomous System Number (ASN) and IP address registration records using ARIN's RDAP web search interface. The tool queries public registries to return structured ownership and registry information for specified ASNs or IP addresses. Users input identifiers such as ASNs or ranges of IP addresses, and the service retrieves detailed data regarding the...

Editors’ Top PickBased on community votes
Other OptionsRanked by votes
  3. Screenshot of RIPEstat
    04
    RIPEstat
    ripe.net

    RIPEstat supports lookups for ASNs, IP addresses, prefixes, and hostnames, with routing and registration context from...

    Open siteView details

Side by side

BGP AS Lookup options compared

ToolBest forStrengthsLimitations
Inventive HQ
inventivehq.com
Quick ASN mapping without account
  • Calculates ownership details for network addresses
  • Queries public routing databases for ASN mapping
  • Fewer unit options
  • Live page excerpt not available
Hurricane Electric BGP Toolkit
bgp.he.net
Free browser-based ASN lookup
  • Search by ASN, IP address, or prefix
  • View origin AS, announced routes, peers, and routing visibility data
  • No paid plan required
    ARIN Whois/RDAP Search
    arin.net
    		Official ARIN registry records
    • Free browser lookup of ASN and IP registration records
    • Resolves queries like ASNs and IP addresses returning structured ownership/registry information
    • Public and does not require paid subscription
      RIPEstat
      ripe.net
      		Routing and registration context from RIPE
      • Supports lookups for ASNs, IP addresses, prefixes, and hostnames
      • Provides routing and registration context from multiple datasets
      • Free web interface
        Team Cymru IP to ASN Lookup
        cymru.com
        		IP to ASN mapping with routing flags
        • Free lookup mapping IP addresses to BGP origin ASN/prefix data
        • Supports IPv4 and IPv6
        • Exposes additional routing metadata flags

          Buyer's guide

          How to choose a bgp as lookup

          When picking a BGP AS lookup tool, consider whether you need quick browser-based results or official registry records. If you want to explore routing paths, peers, and announced routes without signing up, the Hurricane Electric BGP Toolkit provides the most immediate visibility. If you need authoritative ownership and registration details from a regional internet registry, the ARIN RDAP Search or RIPEstat will give you structured, official data, though they may require more specific queries to navigate.

          Questions

          BGP AS Lookup FAQ

          Can I look up any ASN or IP address with these tools?
          Most tools support standard ASNs and IP ranges, but coverage depends on the regional registry that governes the address space. ARIN covers North America, RIPEstat covers Europe and parts of Asia, and other tools may have broader or narrower scope.
          Do I need to create an account to use these BGP lookup services?
          No account is required for basic lookups on the Hurricane Electric BGP Toolkit, ARIN RDAP Search, RIPEstat, and Team Cymru. All are free to use directly in a web browser.
          What is the difference between ASN and IP address lookup?
          An ASN lookup identifies the autonomous system number that controls a block of IP addresses, while an IP address lookup maps a specific IP to its originating ASN and provides routing metadata. Some tools support both query types.
          Which tool gives the most detailed routing information?
          The Hurricane Electric BGP Toolkit provides the richest routing data, including announced routes, peers, and routing visibility, all within a browser interface without a paid plan.
          Are these tools suitable for cybersecurity analysis?
          Yes, network engineers and cybersecurity analysts use these services to verify network ownership, track infrastructure assignments, and investigate routing paths, which helps in assessing network legitimacy and potential risks.
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