{"uid":"cap_mcBpr2-FscIfo39VlBV5W","slug":"2s-io-mac-vendor-lookup-9b55872a","name":"2s.io MAC Vendor Lookup","description":"Resolve a MAC address (or bare OUI prefix) to its IEEE-registered hardware vendor. Accepts any common format — FC:FB:FB:01:02:03, fc-fb-fb-01-02-03, fcfb.fb01.0203, fcfbfb, or a 9-hex MA-S prefix. Uses longest-prefix matching across the IEEE MA-L (24-bit), MA-M (28-bit) and MA-S (36-bit) registries so blocks IEEE has subdivided resolve to the actual manufacturer. Returns the vendor name, the matched OUI prefix and which registry it came from, plus decoded address bits: whether the address is multicast/group, locally administered, or a randomized (privacy) MAC — for which no vendor exists by design. Authoritative bundled IEEE data.","url":"https://2s.io/api/net/mac-vendor","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"const":"http"},"method":{"const":"GET"},"queryParams":{"required":["mac"],"properties":{"mac":{"type":"string","description":"MAC address or OUI prefix in any common format."}}}}}}},"responseSchema":null,"example":{"request":{"input":{"type":"http","method":"GET","queryParams":{"mac":"00:1A:2B:3C:4D:5E"}}},"response":{"data":{"oui":"001A2B","found":true,"query":{"mac":"00:1A:2B:3C:4D:5E"},"source":{"url":"https://standards-oui.ieee.org/","license":"Freely available (IEEE Registration Authority public OUI listing)","provider":"IEEE Registration Authority (MA-L / MA-M / MA-S OUI registries)"},"vendor":"Ayecom Technology Co., Ltd.","registry":"MA-L","normalized":"001A2B3C4D5E","isMulticast":false,"isRandomized":false,"isLocallyAdministered":false},"meta":{"cost":{"usd":0.0012,"tier":0},"caller":"x402","version":null,"endpoint":"net.mac-vendor","settlement":{"txHash":"0x74600706a4a22ae91308f062fdb4a529c967cab8d2d3a55a8a289917b682dd01","network":"eip155:8453","success":true}}}},"exampleRequest":{"mac":"00:1A:2B:3C:4D:5E"},"tags":["x402"],"displayCostAmount":"0.0012","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.0012/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_TpwpRB6nXMvbC9NeK80IL","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":"Resolves a MAC address or OUI prefix to its IEEE-registered hardware manufacturer using longest-prefix matching across MA-L, MA-M, and MA-S registries","exampleAgentPrompt":"Who makes the device with MAC address FC:FB:FB:01:02:03 — look up the IEEE-registered vendor and tell me which registry it came from and whether it's a randomized privacy address.","exampleUseCases":null,"resultDescription":"Returns the IEEE-registered vendor name for the matched OUI, the specific OUI prefix that matched, the registry it came from (MA-L 24-bit, MA-M 28-bit, or MA-S 36-bit), and decoded address bits indicating whether the MAC is multicast/group, locally administered, or a randomized privacy MAC (for which no vendor exists).","failureModes":["MAC address is a randomized/privacy address — no vendor can be assigned by design, endpoint returns flag indicating this","OUI prefix not found in any IEEE registry — unknown or unregistered hardware","Malformed MAC address string that cannot be parsed — likely a 400 error","MA-S (36-bit) subdivision blocks may not resolve if IEEE data is stale"],"whenToPreferThis":"Use this endpoint when you need authoritative IEEE-sourced OUI-to-vendor resolution with longest-prefix matching across all three IEEE registries (MA-L, MA-M, MA-S). It is superior to simpler OUI lookups that only check the 24-bit MA-L registry, as it correctly resolves subdivided blocks to the actual manufacturer. Ideal for network forensics, device inventory enrichment, intrusion detection context, and validating whether a MAC is real vs. randomized.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:57:04.438Z","isFirstParty":false}