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ASN Lookup API
A network organization and recorded country from its ASN.
Look up a network by its autonomous system number. Pass AS13335 or 13335. The response includes the numeric ASN, organization name, and recorded country.
Country describes the network record, not its footprint or an IP address location. An unknown ASN returns 404, malformed input returns 400, and missing fields in a known record are null.
Lookup
Parameters 3
- asnstring · path · required
Autonomous system number with an optional AS prefix. Decimal notation only
- deepboolean · query · optional
When true, adds deep: {}. No additional fields or charge
- langstring · query · optional
Display language as one BCP 47 tag, such as fr or zh-Hant. Changes supported display labels only; IDs, codes, native names, facts, parsing and deep access stay unchanged. Omit for the original response. Unsupported regions use the supported language base; unsupported languages or scripts use English. Missing labels retain their source value. Accept-Language is not read automatically. Available on the current API contract; frozen 1.0.0 is unchanged.
import { parseAPI } from '@parseapi/sdk';
const parse = parseAPI("YOUR_API_KEY");
const result = await parse.asn("AS13335");
console.log(result);Run on your server with a secret key. Calling from a browser or app?
{
"asn": 13335,
"name": "Cloudflare, Inc.",
"country": "US",
"country_name": "United States"
}import { parseAPI } from '@parseapi/sdk';
const parse = parseAPI("YOUR_API_KEY");
const result = await parse.asn("13335");
console.log(result);Run on your server with a secret key. Calling from a browser or app?
{
"asn": 13335,
"name": "Cloudflare, Inc.",
"country": "US",
"country_name": "United States"
}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
Use decimal notation, optionally prefixed with AS. Dotted ASDOT notation is unsupported. Each lookup uses one pooled request on every plan. ?deep=true adds deep: {} with no additional fields or charge.
Display language
Pass lang with a language tag such as fr, pt-BR, or zh-Hant. Existing country_name. ASN and organization names stay unchanged.
Omitting lang preserves the original response. Codes, IDs, numeric facts and native-name fields stay unchanged. Missing translations keep their existing source value; unknown values stay null. A preserved name_local may equal the translated name.
Send a chosen browser preference explicitly, for example { lang: navigator.language } in your JavaScript SDK options. The API does not read Accept-Language automatically. Unsupported regions fall back to their supported base language; unsupported languages or scripts use English. Empty, invalid or repeated tags return 400.
Content-Language identifies languages used in translated display fields and known English fallbacks. This option follows the current API contract. Requests selecting frozen 1.0.0 retain that contract. Select API 2.0.0 to use display language.
41 display language choices
| Language tag | Language |
|---|---|
| en | American English |
| zh-Hans | 简体中文 |
| fr | français (France) |
| de | Deutsch |
| it | italiano |
| ja | 日本語 |
| ko | 한국어 |
| es | español de España |
| ar | العربية |
| bg | български |
| ca | català |
| hr | hrvatski |
| cs | čeština |
| da | dansk |
| nl | Nederlands |
| fi | suomi |
| el | Ελληνικά |
| he | עברית |
| hi | हिन्दी |
| hu | magyar |
| id | Indonesia |
| kk | қазақ тілі |
| ms | Melayu |
| nb | norsk bokmål |
| pl | polski |
| pt | português (Brasil) |
| ro | română |
| ru | русский |
| sk | slovenčina |
| sv | svenska |
| th | ไทย |
| tr | Türkçe |
| uk | українська |
| vi | Tiếng Việt |
| zh-Hant | 繁體中文 |
| en-AU | Australian English |
| en-GB | British English |
| fr-CA | français canadien |
| es-419 | español latinoamericano |
| pt-PT | português europeu |
| zh-Hant-HK | 繁體中文（中國香港特別行政區） |
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