GET /asn/{asn}

ASN lookup API

The network behind the number.

Try it

One pooled request. Included on every plan.

What comes back.

asn

Autonomous system number as an integer, without the AS prefix

name

Recorded network organization name, or null

country

Recorded network country, ISO 3166-1 alpha-2, or null. This is not the network footprint or an IP location

country_name

Country name, or null

1

Pass an ASN

AS13335 or 13335. Use the number you already have.

2

Get the network

Organization name and recorded country, in four fields.

3

Make the logs readable

Label network traffic, inventory, and incident reports.

Coverage

Recorded network organizations and countries for autonomous system numbers worldwide.

Turn an autonomous system number into a network name. Send the ASN from your logs or network tools and get its recorded organization and country.

Accepts the AS prefix or a decimal number. The response asn is always an integer. Each lookup counts as one pooled request on your plan.

Measured response times and live API status

32-bit ASNs.

One pooled request. Every plan.

Start includes 1M API requests a month for $20/mo.

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Make your first request.

One key works across the APIs. Copy a request in your language and get JSON back.

curl "https://api.parseapi.com/asn/AS13335" \
  -H "X-API-Key: YOUR_API_KEY"
// Example response · 200
{
  "asn": 13335,
  "name": "Cloudflare, Inc.",
  "country": "US",
  "country_name": "United States"
}

API referenceSDKsKeys and authentication

Every response field

Response fields

asn
Autonomous system number as an integer, without the AS prefix
name
Recorded network organization name, or null
country
Recorded network country, ISO 3166-1 alpha-2, or null. This is not the network footprint or an IP location
country_name
Country name, or null

QUESTIONS

What is an ASN?
An autonomous system number identifies a network on the internet. Pass AS13335 or 13335 to get its organization name and recorded country.
Is the country where the network operates?
country is the country recorded for that network. It does not describe every place the network operates. Use /ip for the country of an individual IP address.
What happens with an unknown number?
An ASN with no record returns 404. Malformed input returns 400. Within a known record, missing names and countries are null.
Can I use ASDOT notation?
Use the decimal number, optionally prefixed with AS. Dotted ASDOT notation is not accepted.
What does an ASN lookup cost?
One pooled request on every plan. There is no separate lookup charge. deep=true adds an empty deep object.
Get startedDocs