{ "url": "https://phonelookup.dev/prefix/us-667", "npa": "667", "slug": "us-667", "iso": "US", "country": "United States", "regions": [ { "code": "MD", "name": "Maryland", "exchanges": 466 } ], "exchanges": 466, "known": 452, "byLineType": { "fixed_line": 102, "mobile": 175, "unknown": 14, "voip": 175 }, "carriers": [ { "name": "Onvoy", "exchanges": 84, "byLineType": { "voip": 84 }, "ranges": [ "200", "202", "220", "222", "226", "255", "260", "279", "282", "285", "291", "293", "309", "322", "327", "337–342", "347–350", "356–357", "360", "363", "370", "376–377", "380", "387", "396–397", "403", "407", "426–427", "435", "440", "444", "469", "472", "474–480", "489", "525", "532", "538", "548", "551", "556", "567", "576", "657", "660–664", "666–667", "670", "676–678", "687", "766–767", "800", "810", "887–888", "910", "962", "966", "999" ] }, { "name": "AT&T", "exchanges": 69, "byLineType": { "fixed_line": 11, "mobile": 58 }, "ranges": [ "225", "232", "261", "263", "272", "274", "278", "283", "294", "328", "331", "388", "410", "419", "429–430", "432–433", "438", "441–442", "448", "451–452", "456", "460", "470–471", "482", "490–491", "497–499", "501–502", "504–508", "510", "512", "514–516", "518–519", "521", "523", "537", "539–541", "543–544", "549–550", "552", "554", "557", "596", "701", "786", "890–894" ] }, { "name": "T-Mobile", "exchanges": 64, "byLineType": { "mobile": 64 }, "ranges": [ "206", "228–229", "231", "289", "297–298", "310", "319–321", "324–325", "334–335", "351–352", "354–355", "358", "368–369", "371", "375", "378–379", "381", "383", "386", "390–392", "404–406", "415", "423", "431", "434", "436–437", "439", "443", "445", "447", "450", "453", "465", "481", "486", "493–494", "509", "517", "520", "522", "528", "530–531", "542", "560", "570", "706", "802" ] }, { "name": "CoreTel", "exchanges": 44, "byLineType": { "fixed_line": 44 }, "ranges": [ "236–238", "241–249", "254", "267", "269", "277", "295", "300", "326", "332", "336", "345", "353", "362", "364", "366", "372–373", "382", "473", "500", "545", "627", "653", "686", "722", "727", "837", "843", "853", "866", "876", "925", "946" ] }, { "name": "Verizon", "exchanges": 35, "byLineType": { "fixed_line": 11, "mobile": 24 }, "ranges": [ "201", "203", "205", "207–210", "212–214", "216–219", "224", "233–234", "239", "259", "264–265", "270", "275–276", "296", "301", "313", "343", "408", "424", "458", "485", "492", "546", "812" ] }, { "name": "Ton80 Communications", "exchanges": 21, "byLineType": { "voip": 21 }, "ranges": [ "365", "446", "464", "466", "468", "483", "526", "622", "626", "646", "693", "737", "743", "746", "824", "827", "832", "846", "848", "856", "942" ] }, { "name": "Bandwidth.com", "exchanges": 16, "byLineType": { "voip": 16 }, "ranges": [ "268", "304", "315", "318", "359", "374", "393–395", "398", "409", "414", "416–417", "524", "803" ] }, { "name": "Emergency Networks", "exchanges": 15, "byLineType": { "mobile": 15 }, "ranges": [ "250", "252", "262", "361", "467", "503", "644", "647", "656", "665", "668–669", "772", "775", "778" ] }, { "name": "COMMIO LLC", "exchanges": 8, "byLineType": { "voip": 8 }, "ranges": [ "266", "389", "449", "457", "459", "566", "867", "877" ] }, { "name": "Dish Wireless", "exchanges": 8, "byLineType": { "mobile": 8 }, "ranges": [ "384–385", "420", "462", "484", "527", "535–536" ] }, { "name": "Lumen", "exchanges": 8, "byLineType": { "fixed_line": 7, "voip": 1 }, "ranges": [ "251", "284", "288", "306", "317", "323", "401", "422" ] }, { "name": "Fractel", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "529", "577", "688", "758", "842", "899", "977" ] }, { "name": "Peerless Network", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "230", "281", "307–308", "777", "808", "930" ] }, { "name": "TELNYX", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "221", "302", "316", "329", "344", "402", "421" ] }, { "name": "Vonage", "exchanges": 6, "byLineType": { "voip": 6 }, "ranges": [ "223", "235", "257", "280", "454–455" ] }, { "name": "Barr Tell USA", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "240", "314", "400", "967" ] }, { "name": "Brightlink Communications", "exchanges": 4, "byLineType": { "mobile": 3, "voip": 1 }, "ranges": [ "253", "287", "303", "305" ] }, { "name": "HD Carrier", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "286", "299", "399", "776" ] }, { "name": "Nuso", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "412–413", "425", "428" ] }, { "name": "Leap Telecom", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "495–496", "513" ] }, { "name": "Atlantech Online Inc", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "227", "312" ] }, { "name": "Baltimore-Washington Telephone Company", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "333", "367" ] }, { "name": "CSC Wireless LLC", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "273", "346" ] }, { "name": "Callworks Corporation", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "487–488" ] }, { "name": "Comcast", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "215", "418" ] }, { "name": "Exiant", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "256", "271" ] }, { "name": "Five9", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "461", "463" ] }, { "name": "IP Horizon", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "290", "292" ] }, { "name": "Paetec Itel", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "204", "330" ] }, { "name": "Quantum Telecommunications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "755", "788" ] }, { "name": "Terra Nova Telecom", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "855", "900" ] }, { "name": "Tpx Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "547", "553" ] }, { "name": "Twilio International", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "895", "897" ] }, { "name": "Wavenation", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "533–534" ] }, { "name": "Airespring", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "258" ] }, { "name": "Airus Inc", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "770" ] }, { "name": "Opentact", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "738" ] }, { "name": "Spectrum", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "868" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "771" ] }, { "name": "Worldcall Interconnect", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "600" ] } ], "grid": "vmvmfmmmmmmummmvmmmmvvvvmmvfmmvmffmvfffmffffffffffmfmmfvvvvfvmmmffvfvfmvmmmmffmvvvvffvvvfmvvvvmffmmvfmvmvmfvvvmufffvvfvmmmvfmmfvmvfmffmmfvvvvvvfvfmvvvvmmfmmvvmvvmfvfvffmmvmffvmvvmmvmfmmmmvmvmmmvvvvvvvffvvmmmvmvmuffvmvvvmmvvmffvvfmmmmmmvmmmmvmmmvmvmmvmmmmvvmvmvmfmfvmvmvvmmvfvvvvvvvmmvmmmvvvmmfmmffffmfmmmmmmmmmmumfmmmmmmmmmfvvvmmvmmvffmmmvmmmmmmfmfvmmvmfmuvm--m-----vv--m-----vv------------------m---m----------u----------v---vf----------------m-vm-----f--mv--vvvvvmvvmmv-----vvv-------fvv----v------um----m----u----------f----f---------vf----v--v--------f--v-------vv--ffm--mvvm-------f-f-----------v-mv----v-vuf-----------v--v----v----f----vf--v-v----f-vv---------fvf-------fv---------vv-fffffv-v-vv---------vu-------------f----v-----------v---f---u-------uu--v---vf--------uv---------------------v", "patterns": { "all": "^\\+1667[2-9]\\d{6}$", "fixed_line": "^\\+1667(?:2(?:04|27|3[236-8]|4\\d|5[149]|6[4579]|7[67]|8[348]|9[56])|3(?:0[06]|1[2-47]|2[36]|3[0236]|4[35]|53|6[2467]|7[23]|82)|4(?:0[01]|1[23]|2[458]|6[13]|73|9[25-8])|5(?:00|[125]3|3[34]|4[57])|6(?:27|53|86)|7(?:2[27]|38|55|7[01]|8[68])|8(?:12|37|[45]3|6[68]|76|9[0-4])|9(?:25|46|67))\\d{4}$", "mobile": "^\\+1667(?:2(?:0[135-9]|1[02-46-9]|2[4589]|3[149]|5[023]|6[1-3]|7[02-58]|89|9[478])|3(?:0[135]|1[09]|2[01458]|3[145]|46|5[12458]|6[189]|7[1589]|8[13-68]|9[0-2])|4(?:0[4-68]|1[059]|2[039]|3[0-46-9]|4[1-3578]|5[0-368]|6[0257]|7[01]|8[124-6]|9[01349])|5(?:0[1-9]|1[024-9]|2[0-278]|3[015-79]|4[0-469]|5[0247]|[67]0|96)|6(?:00|4[47]|56|6[589])|7(?:0[16]|7[258])|802)\\d{4}$", "voip": "^\\+1667(?:2(?:0[02]|15|2[0-36]|3[05]|5[5-8]|6[068]|7[19]|8[0-25-7]|9[0-39])|3(?:0[247-9]|1[568]|2[279]|3[7-9]|4[0-247-9]|5[0679]|6[035]|7[0467]|8[079]|9[3-9])|4(?:0[2379]|1[46-8]|2[1267]|35|4[0469]|5[4579]|6[4689]|7[24-9]|8[037-9])|5(?:2[4-69]|3[28]|48|5[16]|[67][67])|6(?:2[26]|46|57|6[0-467]|7[06-8]|8[78]|93)|7(?:37|4[36]|58|[67][67])|8(?:0[038]|10|2[47]|32|4[268]|5[56]|[67]7|8[78]|9[579])|9(?:[013]0|42|6[26]|77|99))\\d{4}$" }, "sandbox": { "input": "+16675550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+16675550123", "international": "+1 667-555-0123", "national": "(667) 555-0123", "rfc3966": "tel:+1-667-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "667", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 667?", "answer": "Area code 667 is in Maryland, in the United States: all 466 of its exchanges on record are there. From abroad it is dialled +1 667, then the seven-digit number." }, { "question": "Is a 667 number mobile or landline?", "answer": "Either: in the North American Numbering Plan the line type belongs to the exchange (the three digits after the area code), not to the area code. Of the 466 exchanges on record in 667, 175 (38%) were allocated as mobile, 102 (22%) as fixed line, 175 (38%) as VoIP and 14 (3%) have no line type on record. A number can have been ported since, to another carrier and even to another line type." }, { "question": "Which carriers have numbers in area code 667?", "answer": "40 carriers hold exchanges in 667 on record; the most: Onvoy (84), AT&T (69) and T-Mobile (64). These are the original allocations: with number portability, a number may be served by another carrier today, which only a live carrier lookup (an HLR or MNP query) can tell." }, { "question": "How do I validate a 667 phone number?", "answer": "In E.164 a 667 number matches ^\\+1667[2-9]\\d{6}$: +1, the area code, a central office code that does not start with 0 or 1, then four digits. Written nationally it reads (667) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-227", "us-240", "us-301", "us-410", "us-443" ], "previous": "us-662", "next": "us-669" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 466, "references": [ { "authority": "NANPA", "title": "North American Numbering Plan Administrator", "url": "https://nanpa.com/" }, { "authority": "CNAC", "title": "Canadian Numbering Administrator", "url": "https://www.cnac.ca/" }, { "authority": "ITU", "title": "National numbering plan: United States", "url": "https://www.itu.int/oth/T02020000DE/en" } ] } }