{ "url": "https://phonelookup.dev/prefix/us-304", "npa": "304", "slug": "us-304", "iso": "US", "country": "United States", "regions": [ { "code": "WV", "name": "West Virginia", "exchanges": 800 } ], "exchanges": 800, "known": 786, "byLineType": { "fixed_line": 543, "mobile": 222, "unknown": 14, "voip": 21 }, "carriers": [ { "name": "Frontier", "exchanges": 342, "byLineType": { "fixed_line": 342 }, "ranges": [ "226–227", "229", "231–236", "238–239", "242–243", "245", "247–250", "252–260", "262–265", "267", "269–275", "277–278", "284–287", "289", "291–298", "323–325", "327–329", "332", "334–348", "351", "353–355", "357–358", "363–364", "366–369", "372–373", "375", "379", "382–388", "392–394", "420", "422", "424–426", "428–429", "431–433", "436", "438", "442", "445–446", "448–449", "452–458", "462–467", "469", "472–473", "475", "478", "480", "484–487", "489", "492–493", "496–497", "521–529", "534–536", "538", "547–548", "556", "558–559", "561–562", "564–565", "568", "572", "574", "576–577", "580–581", "583–587", "589", "591–592", "594–595", "598–599", "622–627", "632", "635–637", "645", "647–649", "652–653", "655–656", "658–659", "662", "664–665", "674–675", "679", "682–684", "686", "690–691", "693", "696–697", "721–728", "732–733", "735–739", "742–749", "752–760", "762–763", "765–769", "772–776", "778–779", "782–783", "787–789", "792", "794–797", "799", "822–823", "825", "827", "829", "832–833", "836–837", "842–843", "845–849", "853–856", "861–864", "866", "870", "872–874", "876–877", "880", "882", "884", "889", "892–895", "898", "924–927", "934", "937–938", "941–943", "946–947", "949", "954", "957", "965", "967–968", "984", "986", "988", "998" ] }, { "name": "AT&T", "exchanges": 73, "byLineType": { "fixed_line": 1, "mobile": 72 }, "ranges": [ "203", "206", "208–210", "216", "261", "268", "276", "280–282", "299", "303", "305", "312", "320", "374", "376", "389", "400", "435", "476", "482", "488", "531–532", "541", "545–546", "549–550", "552", "560", "566", "579", "593", "596", "633–634", "638", "640–642", "644", "646", "651", "654", "668", "670", "673", "687–688", "703–704", "719", "771", "777", "780", "786", "790", "839", "871", "887–888", "890", "914", "916", "923", "940", "987", "993–994" ] }, { "name": "T-Mobile", "exchanges": 61, "byLineType": { "mobile": 61 }, "ranges": [ "200", "215", "218", "222", "224", "237", "240", "279", "283", "319", "322", "350", "356", "362", "365", "395", "412", "415–417", "419", "421", "437", "439–441", "444", "490", "512", "514", "516–518", "610", "615–617", "620", "629", "657", "685", "695", "731", "741", "751", "761", "812", "820", "834", "838", "844", "886", "910", "919", "922", "952–953", "955", "990", "992", "995" ] }, { "name": "Verizon", "exchanges": 50, "byLineType": { "fixed_line": 8, "mobile": 42 }, "ranges": [ "207", "266", "308", "360", "377", "380–381", "396", "427", "479", "481", "483", "491", "494", "500", "533", "539", "542–544", "563", "588", "590", "601", "639", "650", "707", "710", "712", "730", "784–785", "807", "830", "859–860", "928", "930", "939", "956", "960", "962–964", "966", "975", "979", "989", "991", "997" ] }, { "name": "Stratus Wave Communications", "exchanges": 47, "byLineType": { "fixed_line": 47 }, "ranges": [ "214", "217", "219", "221", "313–318", "370–371", "401–408", "418", "502–510", "602–609", "713–715", "801–806" ] }, { "name": "FiberNet", "exchanges": 43, "byLineType": { "fixed_line": 43 }, "ranges": [ "201", "204–205", "225", "230", "302", "307", "321", "326", "333", "390", "430", "447", "471", "515", "630", "705–706", "720", "734", "740", "750", "764", "781", "791", "793", "817–819", "828", "831", "835", "852", "858", "865", "868", "883", "891", "899", "929", "951", "970", "981" ] }, { "name": "UScellular", "exchanges": 35, "byLineType": { "mobile": 35 }, "ranges": [ "228", "246", "288", "290", "573", "575", "578", "582", "612–614", "618–619", "621", "660–661", "663", "667", "669", "671–672", "676–678", "680", "689", "692", "694", "698", "701–702", "813", "851", "920–921" ] }, { "name": "Lumen", "exchanges": 33, "byLineType": { "fixed_line": 33 }, "ranges": [ "212", "220", "397", "409", "459–460", "470", "513", "519", "551", "553", "681", "699", "716", "816", "840–841", "867", "881", "885", "896", "902–904", "906–908", "915", "931–933", "944–945" ] }, { "name": "Optimum", "exchanges": 15, "byLineType": { "fixed_line": 15 }, "ranges": [ "223", "301", "306", "398", "501", "520", "600", "717", "850", "913", "917", "971", "973", "977–978" ] }, { "name": "Citynet", "exchanges": 10, "byLineType": { "fixed_line": 10 }, "ranges": [ "309–310", "391", "423", "554", "709", "800", "815", "901", "982" ] }, { "name": "Lumos Network", "exchanges": 10, "byLineType": { "fixed_line": 10 }, "ranges": [ "241", "352", "399", "414", "461", "729", "809", "857", "948", "969" ] }, { "name": "Armstrong Telephone Company", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "349", "474", "477", "628", "643", "824", "869" ] }, { "name": "Comcast", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "213", "378", "708", "718", "810", "905", "909" ] }, { "name": "North County Communications", "exchanges": 6, "byLineType": { "fixed_line": 6 }, "ranges": [ "495", "498–499", "569–571" ] }, { "name": "Bandwidth.com", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "410", "814", "918", "935" ] }, { "name": "IDT America", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "359", "974", "980", "999" ] }, { "name": "RAM Page Paging", "exchanges": 4, "byLineType": { "mobile": 4 }, "ranges": [ "361", "537", "540", "631" ] }, { "name": "Hardy Telecommunications", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "434", "530", "897" ] }, { "name": "Peerless Network", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "244", "451", "996" ] }, { "name": "West Side Telecommunications", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "798", "879", "983" ] }, { "name": "American Messaging", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "330", "450" ] }, { "name": "Armstrong Telecommunications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "666", "972" ] }, { "name": "Communications Plus", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "808", "985" ] }, { "name": "Emergency Networks", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "304", "912" ] }, { "name": "Lauttamus Communications", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "331", "468" ] }, { "name": "Onvoy", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "597", "878" ] }, { "name": "Shentel", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "202", "900" ] }, { "name": "TELNYX", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "826", "936" ] }, { "name": "Appalachian Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "443" ] }, { "name": "Aquis Communications", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "770" ] }, { "name": "COMMIO LLC", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "961" ] }, { "name": "CoreTel", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "821" ] }, { "name": "Digital Connections", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "413" ] }, { "name": "HD Carrier", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "251" ] }, { "name": "Nuso", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "557" ] }, { "name": "Spruce Knob Seneca Rocks Telephone", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "567" ] }, { "name": "War Telephone", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "875" ] }, { "name": "YMax Communications", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "300" ] } ], "grid": "mffmffmfmmfufvfmmfmfffmfmfffmffffffffmffmfffvfmffffvfffffffffmffffmfmfffffffmffmmmmmffffmfmffffffffmvffmmmffmffumffffffmmfmfffffffmmffffffffffffffffffmfffffmfffmmmffmffffffffmfmmvffffffffffmfffffmmfffmfffffffffvumffmmmfmfmfffffffffffffmfmfmmmfmmfffffmvffffffffffffffffmfffffffmffmfmmmffffmfmmffmffffffffffffffffumfmfmmmffffffffffffmmmfffmfmmmmmmmmffmmfmffuffffmffmffmffffffmfmffmmffmfffffmfmffmffmvfffmffffffffmummmmmmmmmmfffffffmfmfmmfffmmmmmfmfmfffmmffmffmffmmfmfffmmmmmmmffmmmfmffffmfmmmffmfmmffmfummmmfffvfmumfffffvmffffffffffmmfffffffffmfffffffffmfffffffffmffffffffmmfffffmffmfffmmmfffmffffffffffffffffmffvummvfffffmfffffvfffmfffmfffmmffffmffffffmfffffffmmffffffffffmffffffvfffffffmmmfmffffffffffffffvfffvmumfmfmfvmmmmmffffmffffffvvffmmfffffffffufmmfmmfuumvmmmfmffffffffmuffffffffffmfmmmmmmmvmff", "patterns": { "all": "^\\+1304[2-9]\\d{6}$", "fixed_line": "^\\+1304(?:2(?:0[12457]|1[02479]|2[0135-79]|3[0-689]|4[1-357-9]|5[02-9]|6[02-579]|7[0-578]|8[4-79]|9[1-8])|3(?:0[12679]|1[03-8]|2[13-9]|3[2-9]|4\\d|5[1-57-9]|6[346-9]|7[0-359]|8[0-8]|9[0-47-9])|4(?:0[1-9]|1[348]|2[02-9]|3[0-468]|4[25-9]|5[2-9]|6[0-79]|7[0-578]|8[04-79]|9[235-9])|5(?:[02]\\d|1[0359]|3[04-68]|4[78]|5[1346-9]|6[12457-9]|7[0-2467]|8[013-79]|9[124589])|6(?:0[02-9]|2[2-8]|3[025-7]|4[357-9]|5[235689]|6[24-6]|7[459]|8[1-46]|9[013679])|7(?:0[5-79]|1[3-7]|2\\d|3[2-9]|[4-6][02-9]|7[2-689]|8[1-37-9]|9[1-9])|8(?:0[0-689]|1[5-9]|2[1-57-9]|3[1-35-7]|4[0-35-9]|5[02-8]|[69][1-9]|7[02-79]|8[0-59])|9(?:0[0-46-8]|1[357]|2[4-79]|3[0-478]|4[1-9]|5[147]|6[57-9]|7[0-47-9]|8[0-68]|9[89]))\\d{4}$", "mobile": "^\\+1304(?:2(?:0[03689]|1[568]|2[248]|37|4[06]|6[168]|7[69]|8[0-38]|9[09])|3(?:0[3-58]|1[29]|2[02]|3[01]|5[06]|6[0-25]|7[467]|89|9[56])|4(?:[05]0|1[25-79]|21|3[579]|4[0134]|68|7[69]|8[1-38]|9[014])|5(?:1[246-8]|3[1-379]|4[0-69]|5[02]|[69][036]|7[3589]|8[28])|6(?:01|1[02-9]|2[019]|3[13489]|4[0-246]|5[0147]|6[0137-9]|7[0-36-8]|8[057-9]|9[2458])|7(?:0[1-4]|1[029]|3[01]|[4-6]1|7[017]|8[04-6]|90)|8(?:07|1[23]|[269]0|3[0489]|44|5[19]|71|8[6-8])|9(?:1[02469]|2[0-38]|39|40|5[2356]|6[02-46]|75|8[79]|9[0-57]))\\d{4}$", "voip": "^\\+1304(?:2(?:13|44|51)|3(?:00|78)|4(?:10|51)|597|7[01]8|8(?:1[04]|26|78)|9(?:0[59]|18|3[56]|61|96))\\d{4}$" }, "sandbox": { "input": "+13045550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+13045550123", "international": "+1 304-555-0123", "national": "(304) 555-0123", "rfc3966": "tel:+1-304-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "304", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 304?", "answer": "Area code 304 is in West Virginia, in the United States: all 800 of its exchanges on record are there. From abroad it is dialled +1 304, then the seven-digit number." }, { "question": "Is a 304 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 800 exchanges on record in 304, 222 (28%) were allocated as mobile, 543 (68%) as fixed line, 21 (3%) as VoIP and 14 (2%) 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 304?", "answer": "38 carriers hold exchanges in 304 on record; the most: Frontier (342), AT&T (73) and T-Mobile (61). 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 304 phone number?", "answer": "In E.164 a 304 number matches ^\\+1304[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 (304) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-681" ], "previous": "us-303", "next": "us-305" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 800, "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" } ] } }