{ "url": "https://phonelookup.dev/prefix/us-307", "npa": "307", "slug": "us-307", "iso": "US", "country": "United States", "regions": [ { "code": "WY", "name": "Wyoming", "exchanges": 525 } ], "exchanges": 525, "known": 499, "byLineType": { "fixed_line": 217, "mobile": 200, "unknown": 26, "voip": 82 }, "carriers": [ { "name": "Lumen", "exchanges": 124, "byLineType": { "fixed_line": 122, "voip": 2 }, "ranges": [ "200–201", "205", "212–213", "219", "222–224", "232–235", "237", "242", "253", "257", "261", "265–266", "268–269", "271", "273", "276", "278", "288", "298", "313", "322–324", "328", "332", "334–336", "344", "352", "358", "362", "367", "379", "382", "392", "416", "432–433", "436", "439", "447", "456", "459–464", "472–473", "527", "532", "534", "537", "543", "545", "577–578", "587", "632–635", "637–638", "643", "655", "672–674", "682–688", "721", "732–735", "739", "742", "745", "754–755", "766", "771–773", "775", "777–778", "783", "788–789", "828–829", "834", "836–837", "849", "855–857", "859", "872", "875", "877", "886", "896", "939", "995" ] }, { "name": "Union Telephone", "exchanges": 65, "byLineType": { "mobile": 65 }, "ranges": [ "260", "270", "280", "320", "329–330", "339", "345", "350", "354", "360", "377", "380", "390", "450", "477", "520", "540–541", "549", "567", "600", "701–710", "712–720", "722–724", "727–728", "730–731", "740–741", "744", "747", "749", "759", "779–780", "790", "798–799", "850", "858", "870", "884", "890", "977" ] }, { "name": "Verizon", "exchanges": 63, "byLineType": { "fixed_line": 3, "mobile": 60 }, "ranges": [ "206", "209", "214", "226", "231", "240", "248", "250–251", "254", "258–259", "262", "272", "274–275", "277", "281–282", "286–287", "321", "331", "338", "340", "343", "349", "359", "368", "370–371", "389", "399", "421", "431", "438", "441", "448", "466", "487", "533", "575", "620–621", "630–631", "670", "677", "679", "689–690", "699", "752", "757", "760", "763", "840", "851", "871", "921–922", "941", "949" ] }, { "name": "AT&T", "exchanges": 52, "byLineType": { "fixed_line": 3, "mobile": 49 }, "ranges": [ "202", "210", "216–217", "229", "236", "238–239", "241", "247", "267", "290", "294", "299", "304–305", "309", "319", "351", "361", "365", "376", "388", "391", "397–398", "401–402", "404", "408–409", "412–413", "418", "449", "471", "480", "483", "489", "622", "624", "629", "640", "660", "680", "696", "751", "761", "774", "797", "823", "899" ] }, { "name": "Onvoy", "exchanges": 40, "byLineType": { "voip": 40 }, "ranges": [ "218", "227", "243", "293", "295–296", "300", "316–317", "342", "357", "372", "405", "407", "417", "420", "424", "427", "430", "434", "442", "445–446", "452–454", "474", "476", "479", "481", "500", "529", "554", "556", "667", "785", "800", "910", "996", "998" ] }, { "name": "Bandwidth.com", "exchanges": 19, "byLineType": { "voip": 19 }, "ranges": [ "215", "228", "230", "302–303", "312", "314", "318", "363–364", "381", "387", "395–396", "403", "423", "429", "488", "509" ] }, { "name": "RT Communications", "exchanges": 17, "byLineType": { "fixed_line": 17 }, "ranges": [ "245–246", "347", "375", "437", "457", "465", "467–468", "544", "547", "649", "738", "746", "756", "864", "876" ] }, { "name": "T-Mobile", "exchanges": 15, "byLineType": { "mobile": 15 }, "ranges": [ "203", "220–221", "256", "355", "385", "394", "410", "419", "428", "435", "478", "482", "485", "920" ] }, { "name": "Union Telephone Company", "exchanges": 11, "byLineType": { "fixed_line": 11 }, "ranges": [ "325–327", "348", "356", "378", "386", "782", "786–787", "874" ] }, { "name": "TCT WEST", "exchanges": 9, "byLineType": { "fixed_line": 9 }, "ranges": [ "366", "469", "548", "568", "664", "762", "765", "867–868" ] }, { "name": "Spectrum", "exchanges": 8, "byLineType": { "fixed_line": 8 }, "ranges": [ "225", "264", "315", "337", "369", "426", "490", "514" ] }, { "name": "Airus Inc", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "204", "207", "285", "393", "414", "522", "650" ] }, { "name": "Range Telephone Cooperative", "exchanges": 6, "byLineType": { "fixed_line": 6 }, "ranges": [ "283", "736–737", "750", "758", "878" ] }, { "name": "Advanced Communications", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "425", "675", "681", "854", "881" ] }, { "name": "Silver Star Telephone Company", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "244", "284", "654", "883", "885" ] }, { "name": "UBET Wireless", "exchanges": 5, "byLineType": { "mobile": 5 }, "ranges": [ "252", "255", "297", "493", "499" ] }, { "name": "All West", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "279", "444", "497", "770" ] }, { "name": "COMMIO LLC", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "291", "384", "443", "990" ] }, { "name": "TELNYX", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "249", "475", "888", "999" ] }, { "name": "Dubois Telephone Exchange", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "383", "455", "486" ] }, { "name": "Vonage", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "374", "451", "776" ] }, { "name": "Bresnan Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "373", "440" ] }, { "name": "Dish Wireless", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "346", "458" ] }, { "name": "Exiant", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "496", "639" ] }, { "name": "Fractel", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "666", "900" ] }, { "name": "Nuso", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "333", "415" ] }, { "name": "Project Telephone Company", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "341", "645" ] }, { "name": "Silver Star Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "353", "576" ] }, { "name": "Silver Star PCS", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "880", "887" ] }, { "name": "TRI TEL", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "586", "764" ] }, { "name": "Access2Go", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "306" ] }, { "name": "CSC Wireless LLC", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "263" ] }, { "name": "Chugwater Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "422" ] }, { "name": "Comcast", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "289" ] }, { "name": "Emergency Networks", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "310" ] }, { "name": "Golden West Telecommunications Cooperative", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "663" ] }, { "name": "HD Carrier", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "292" ] }, { "name": "IP Horizon", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "301" ] }, { "name": "Terra Nova Telecom", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "400" ] }, { "name": "Twilio International", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "895" ] }, { "name": "Wavenation", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "484" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "507" ] } ], "grid": "ffmmffffummuffmvmmvvmmfffffvvmvmffffmfmmmmfvfffmmvmmmfmmmfmmmfmmfffmffmfmffmfmffmmmfffmmfvmvvvfvvmfmvvvvmmvuummuvfvfvvvmmmfffffffmmmffffffmmmfvmfmmffmmmffmmfvfmmmfvvmffmfmmvfvfmmffmvffvmfvmmmmffmvvmmmvmmvmvuvmmmufmfffvmmvmfvvffvmvvmffvmffmffmvvfvvfmmmvvvvfffmfffffffmfffumffvvvmmvmvmmfmfmvmf--m--vf-mv------f-v-u--f-----m-f----f-v--fmf-uf--mm-fff-ffm----vuv-uu-------mf------mfff-------ff------------m----u-----u--------mmm-m----mmmffff-ffvm--f-f---ff---ff----m--ff-vv--m-ffff-m-mmffffffffmm-----m--mummmmmmmmmmummmmmmmmmfmmmu-mm-mmffffffffmmf-mffm-mfmm-fffmfmmmfmfff---ffffmfvffmm-ff-vffffm------mmmv----------u-----------f----fv----f-ff--m--------fmm--ffffmf----f--ff-mmf-fffff-mf-fmffmv-m----vf--mv---------vu--------mmm----------------f-m-------mu-------uu----------u-----um----------u-v----fv-vv", "patterns": { "all": "^\\+1307[2-9]\\d{6}$", "fixed_line": "^\\+1307(?:2(?:0[014-7]|1[23]|2[2-6]|3[2-57]|4[24-6]|5[37]|6[14-689]|7[134689]|8[3-58]|9[48])|3(?:1[35]|2[2-8]|3[2-7]|4[1478]|5[2368]|6[2679]|7[3589]|8[236]|9[23])|4(?:1[24-6]|2[256]|3[23679]|4[047]|5[5-79]|6[0-57-9]|7[23]|8[46]|9[07])|5(?:07|14|2[27]|3[247]|4[3-578]|68|7[6-8]|8[67])|6(?:3[2-578]|4[359]|5[045]|6[34]|7[2-5]|8[1-8])|7(?:21|3[2-9]|4[256]|5[04-68]|6[24-6]|7[0-3578]|8[236-9])|8(?:2[38]|3[467]|49|5[4-79]|6[478]|7[24-8]|8[1356]|96)|9(?:39|95))\\d{4}$", "mobile": "^\\+1307(?:2(?:0[239]|1[0467]|2[019]|3[1689]|4[0178]|5[0-24-689]|6[0237]|7[0257]|8[0-267]|9[079])|3(?:0[459]|1[09]|2[019]|3[0189]|4[03569]|5[01459]|6[0158]|7[0167]|8[0589]|9[0147-9])|4(?:0[12489]|1[0389]|2[18]|3[158]|4[189]|5[08]|66|7[178]|8[023579]|9[39])|5(?:20|33|4[019]|67|75)|6(?:[046]0|2[0-249]|3[01]|7[079]|8[09]|9[069])|7(?:0[1-9]|1[02-9]|2[02-478]|3[01]|4[01479]|5[1279]|6[013]|7[49]|80|9[07-9])|8(?:40|5[018]|7[01]|8[047]|9[09])|9(?:2[0-2]|4[19]|77))\\d{4}$", "voip": "^\\+1307(?:2(?:1[589]|2[78]|30|4[39]|89|9[1-356])|3(?:0[0-36]|1[246-8]|42|57|6[34]|7[24]|8[147]|9[56])|4(?:0[0357]|17|2[03479]|3[04]|4[2356]|5[1-4]|7[4-69]|8[18]|96)|5(?:0[09]|29|5[46])|6(?:39|6[67])|7(?:76|85)|8(?:00|29|88|95)|9(?:[01]0|9[0689]))\\d{4}$" }, "sandbox": { "input": "+13075550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+13075550123", "international": "+1 307-555-0123", "national": "(307) 555-0123", "rfc3966": "tel:+1-307-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "307", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 307?", "answer": "Area code 307 is in Wyoming, in the United States: all 525 of its exchanges on record are there. From abroad it is dialled +1 307, then the seven-digit number." }, { "question": "Is a 307 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 525 exchanges on record in 307, 200 (38%) were allocated as mobile, 217 (41%) as fixed line, 82 (16%) as VoIP and 26 (5%) 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 307?", "answer": "42 carriers hold exchanges in 307 on record; the most: Lumen (124), Union Telephone (65) and Verizon (63). 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 307 phone number?", "answer": "In E.164 a 307 number matches ^\\+1307[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 (307) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [], "previous": "ca-306", "next": "us-308" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 525, "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" } ] } }