{"slug":"asn-lookup-underscoredone-com-lookup-913e30","title":"Given an internet address (IP) or a network identification number (ASN), this to","host":"asn-lookup.underscoredone.com","method":"POST","resource":"https://asn-lookup.underscoredone.com/lookup","category":"company","description":"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.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":534,"reported_calls_30d":3,"reported_payers_30d":3,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"query":"8.8.8.8"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$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"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":534,"error":null}],"description_full":"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.","last_updated":"2026-09-14T19:47:56.295Z","schemes":["exact"]}