- 1Choose file
- 2Adjust
- 3Download
ASN & BGP Route Lookup online, free
Inspect Autonomous System Numbers, BGP routing prefixes, and ISP origins.
- Encrypted server job — auto-deleted in 24 h
- Free, no sign-up, no watermark
- TXT
How to use ASN & BGP Route Lookup · ASN & BGP Route Lookup — frequently asked questions
How to use ASN & BGP Route Lookup
- 1
Add your TXT file
Drop a file on the page, paste it, or click Select Files.
- 2
Fine-tune the settings
The defaults already suit most files; change them only if you need to.
- 3
Run ASN & BGP Route Lookup
Press the start button. The file is processed on an encrypted, auto-deleting server job.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What ASN & BGP Route Lookup can do
- Encrypted server processing; files are deleted automatically within 24 hours
- Free with no sign-up, no watermark and no daily limit
ASN & BGP Route Lookup — frequently asked questions
What is an Autonomous System Number (ASN)?
An ASN is a globally unique identifier assigned by regional internet registries (RIRs) to a network operator or ISP controlling a collection of IP routing prefixes using BGP.
What information does this tool provide?
The lookup reports the ASN number, autonomous system organization name, registered country, allocated CIDR routing prefix, and network registry origin.
Can I query either an IP address or an ASN?
Yes. You can input either an IPv4/IPv6 address (such as 8.8.8.8) to discover its owning ASN, or input an ASN directly (such as AS15169) to view its details.
How does Sada Files query ASN routing data?
The tool queries authoritative DNS route servers and public RDAP directories to resolve routing information without retaining user target queries.
Does Sada Files keep records of my lookups?
No. All requests are processed statelessly in real time and discarded immediately without persistent logging.
Related tools
- WHOIS & Domain Registration LookupLook up domain registration details, registrar name, creation date, expiry date, and nameservers via official RDAP protocols.
- Port Reachability CheckerProbe public IP or domain ports to verify service reachability safely.
- Website Status & Is It Down CheckerCheck if a website or web service is down for everyone or just for you, measuring HTTP response codes and latency.
- Broken Link CheckerCheck up to 200 links on one page and report broken, unreachable and redirecting links with status codes.
- Website Cache & Compression AuditorAnalyze HTTP cache headers (Cache-Control, ETag, max-age) and content compression ratios (Brotli, Gzip, Zstandard).
- Canonical Tag & Loop InspectorVerify canonical URL tags, detect self-referential links, cross-domain mismatches, loop redirects, and HTTP canonical headers.
- Heading Structure CheckerShow a page's H1–H6 outline and flag a missing or repeated H1, skipped levels and empty headings.
- Hreflang CheckerValidate hreflang codes, self-references, x-default and return links across up to 50 URLs.