{"uid":"cap_7uXCYZ8h8q5lDMiXK3gl2","slug":"vextorium-asn-info-lookup-f7c9e25a","name":"Vextorium ASN Info Lookup","description":"558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.","url":"https://api.vextorium.com/v1/asn-info?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"asn":{"type":"string"}}},"responseSchema":{"type":"json","example":{"asn":13335,"block":"Assigned by ARIN","holder":"CLOUDFLARENET - Cloudflare, Inc.","source":"RIPEstat (RIPE NCC)","announces":true,"ipv4_prefixes":2478,"ipv6_prefixes":3057,"prefixes_sample":["104.28.1.0/24","162.158.106.0/24"],"ipv4_addresses_approx":1498368}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YfpILS90XvHMU9so_e9Ht","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns detailed information about an Autonomous System Number (ASN) including holder name, IP prefix counts, block source, and sample prefixes.","exampleAgentPrompt":"Can you look up ASN 13335 and tell me who owns it, how many IPv4 and IPv6 prefixes they have, and what registry block it's assigned from?","exampleUseCases":[{"title":"Identify network owner behind suspicious traffic","prompt":"We're seeing traffic from a suspicious IP — can you look up ASN 14061 and tell me who the registered holder is, how many prefixes they announce, and what block it's assigned from?"},{"title":"Enrich threat intelligence report with ASN data","prompt":"I'm writing a threat report and need ASN details for AS9009 — specifically the holder name, whether it actively announces prefixes, and a sample of the IP ranges they own."},{"title":"Compare IPv4 vs IPv6 adoption for a major CDN","prompt":"Can you pull up the ASN info for AS20940 and show me how many IPv4 versus IPv6 prefixes Akamai is announcing right now?"}],"resultDescription":"A JSON object containing the ASN integer, the registered holder organization name, the block assignment source and regional registry, the data source (e.g. RIPEstat), a boolean indicating whether the ASN is actively announcing prefixes, the count of IPv4 and IPv6 prefixes, an approximate count of IPv4 addresses, and a sample list of announced IP prefixes.","failureModes":["Invalid or non-existent ASN returns null fields or an error","ASN string not formatted correctly may cause a validation error","Unassigned or reserved ASNs may return empty or null holder/block fields","RIPEstat upstream outage may result in stale or unavailable data"],"whenToPreferThis":"Use this endpoint when you need structured, multi-field ASN intelligence in a single call — including holder identity, prefix counts, block source, and sample prefixes — rather than a simple WHOIS lookup or raw registry query. Ideal for network enrichment pipelines, threat intelligence workflows, and IP infrastructure analysis where you need reliable, parsed data without scraping registries yourself.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:44:09.650Z","isFirstParty":false,"canonicalSlug":"vextorium-asn-info-lookup-f7c9e25a"}