Given an internet address (IP) or a network identification number (ASN), this to
Given an internet address (IP) or a network identification number (ASN), this tool returns who operates that piece of the internet: the network number, the owner's name, the country it's registered in, the regional registry that manages it, and the exact address range it belongs to.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
534 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://asn-lookup.underscoredone.com/lookup
| Category | Company and compliance |
|---|---|
| Provider host | asn-lookup.underscoredone.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 534 ms |
Example input (from the provider)
{
"body": {
"query": "8.8.8.8"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"query": {
"description": "An IP address (such as 8.8.8.8 or 2001:4860:4860::8888) or an ASN reference (such as AS15169 or 15169) to look up.",
"type": "string"
}
},
"required": [
"query"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"allocated": {
"type": "string"
},
"api_version": {
"type": "string"
},
"asn": {
"type": "string"
},
"country": {
"type": "string"
},
"holder": {
"type": "string"
},
"prefix": {
"type": "string"
},
"query": {
"type": "string"
},
"registry": {
"type": "string"
}
},
"required": [
"api_version",
"query",
"asn",
"holder",
"country",
"registry",
"prefix",
"allocated"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}