{"uid":"cap_ZaQr3SHViMrjmVIxTkyU2","slug":"basebuilder-misc-asn-lookup-04704851","name":"BaseBuilder Misc ASN Lookup","description":"BaseBuilder Misc API hub - 21 paid endpoints","url":"https://bb-misc.vercel.app/api/asn-lookup","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.068343","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.068343/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.068343","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.068343","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_9rEzPuURczoJX-0vX663X","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.068343","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up Autonomous System Number (ASN) information for a given IP address or ASN identifier","exampleAgentPrompt":"Can you look up the ASN information for the IP address 8.8.8.8 and tell me what organization owns it and what network range it belongs to?","exampleUseCases":null,"resultDescription":"Returns ASN number, owning organization name, country, and network block/CIDR range associated with the queried IP address or ASN identifier","failureModes":["Invalid IP address format returns a 400 error","Private or reserved IP ranges may return no ASN data","Unknown or unregistered ASN may return empty results","Payment failure (402) if USDC balance insufficient","Service unavailable (503) during downtime"],"whenToPreferThis":"Use this endpoint when you need to identify the network provider, ISP, or organization that owns a given IP address via its Autonomous System Number. Useful for cybersecurity investigations, traffic analysis, fraud detection, and network enrichment workflows where you need ISP or carrier attribution for IPs.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:37:01.035Z","isFirstParty":false}