ASN Lookup

A validated ASN request for AS15169.

How it works

• Validate a public IP address or an AS number (ASnnn) and reject private/internal targets.
• Ask the platform API, which queries the configured ASN/routing provider.
• Normalize the ASN number, holder, country and announced prefixes.

• Prefix announcements change as routing changes; the result is fetched live.

Methodology

1. Validate a public IP literal or an AS number and reject every private/reserved range.
2. Query the deployment's configured ASN/routing provider with the validated target only.
3. Normalize the ASN number, holder, country and announced prefixes.

Time model

• Time source: UTC.
• Timezone: Routing data is fetched at request time; prefix announcements can change between queries.
• Locale: ASN numbers and prefixes are numeric tokens; no locale-specific formatting is applied.
• Daylight saving: The query instant is absolute; daylight-saving transitions do not affect it.
• Reference date: There is no reference-date input; the result reflects the routing registry when the request is served.

Usage

1. Enter a public IP address (for example 8.8.8.8) or an AS number (for example AS15169).
2. Run the lookup.
3. Read the ASN, holder name, country and announced prefixes.

Examples

These are examples, not current values: they use fixed inputs, while the interactive tool computes live results in your browser.

AS number

{
  "target": "AS15169"
}

Public IP

{
  "target": "8.8.8.8"
}

Limitations

Server processing and data flow

This lookup runs on the Gampangin API because ASN/routing data is not available to a browser directly. Your IP or AS number is sent to our server, which queries the configured ASN provider.

The target is not retained or logged, the response is no-store and sets no cookie, and no provider credential reaches the browser.

Reading the result

The ASN identifies the network; the holder is the registered organization; the country is the registry's country code; the prefixes are the address blocks the provider associates with the ASN.