{ "url": "https://phonelookup.dev/prefix/us-320", "npa": "320", "slug": "us-320", "iso": "US", "country": "United States", "regions": [ { "code": "MN", "name": "Minnesota", "exchanges": 535 } ], "exchanges": 535, "known": 511, "byLineType": { "fixed_line": 268, "mobile": 123, "unknown": 24, "voip": 120 }, "carriers": [ { "name": "Lumen", "exchanges": 99, "byLineType": { "fixed_line": 96, "voip": 3 }, "ranges": [ "202–203", "209", "214", "227", "229", "231", "235", "238", "240", "242", "244–245", "251–253", "255", "259", "265", "269–270", "272", "275", "281", "286", "289", "299", "300", "310", "315", "317", "322", "325", "327–329", "332", "338", "342", "352", "356–358", "363", "365", "377", "384", "395–396", "408", "417", "421", "432–434", "468", "523", "526", "529", "543", "547", "554", "562", "564", "584", "589", "591", "594", "616", "626", "629", "632", "634", "649–650", "654–656", "674", "679", "685", "693", "722", "732", "746", "748", "759", "762–763", "833", "839", "842–843", "846", "852", "857", "864", "886", "968" ] }, { "name": "Verizon", "exchanges": 59, "byLineType": { "fixed_line": 2, "mobile": 57 }, "ranges": [ "212", "221", "226", "241", "247–250", "263", "287", "290", "292–293", "297", "303–305", "326", "333", "345", "349", "361–362", "364", "368", "372", "375", "385", "397", "406", "413", "423–424", "429", "435–436", "438", "444", "460", "478", "481", "500", "510", "522", "552", "583", "630", "648", "682–683", "733", "760", "805", "808", "815", "874", "894", "905", "979" ] }, { "name": "Onvoy", "exchanges": 58, "byLineType": { "voip": 58 }, "ranges": [ "205", "207–208", "210", "213", "215–216", "223", "301–302", "306–308", "313–314", "316", "321", "323", "335", "337", "341", "344", "348", "373", "378", "381", "386", "388", "391", "407", "410", "422", "427", "441", "451", "456", "464", "497", "514", "525", "527", "530", "533", "535", "537", "560", "566", "595", "620", "635", "640", "703", "738", "774", "803", "844", "910", "923" ] }, { "name": "AT&T", "exchanges": 31, "byLineType": { "fixed_line": 3, "mobile": 28 }, "ranges": [ "201", "219–220", "237", "260", "266–267", "279", "288", "319", "334", "339", "359–360", "380", "400", "403", "425", "443", "447", "477", "479", "496", "579", "582", "699", "761", "766", "779", "841", "981" ] }, { "name": "Frontier", "exchanges": 30, "byLineType": { "fixed_line": 30 }, "ranges": [ "233", "254", "369", "382–383", "495", "532", "542", "558", "563", "592", "598", "664", "669", "676–677", "684", "692", "697", "743", "769", "838", "848", "855", "877", "967", "974", "978", "983", "995" ] }, { "name": "T-Mobile", "exchanges": 28, "byLineType": { "mobile": 28 }, "ranges": [ "217", "224", "232", "262", "280", "282", "291", "295–296", "298", "309", "336", "405", "412", "420", "431", "449", "459", "491–493", "515", "544", "577", "726", "775", "828", "980" ] }, { "name": "Fractel", "exchanges": 17, "byLineType": { "voip": 17 }, "ranges": [ "465–466", "488", "499", "644", "666", "724", "777", "799", "800", "822", "899", "900", "933", "946", "966", "977" ] }, { "name": "MCC Telephony", "exchanges": 15, "byLineType": { "fixed_line": 15 }, "ranges": [ "343", "350", "379", "399", "404", "439–440", "565", "569", "574", "633", "657", "853", "870", "993" ] }, { "name": "TDS Telecom", "exchanges": 12, "byLineType": { "fixed_line": 12 }, "ranges": [ "264", "268", "276", "278", "346", "354", "366", "485", "599", "796", "826", "875" ] }, { "name": "Spectrum", "exchanges": 11, "byLineType": { "fixed_line": 11 }, "ranges": [ "347", "401", "409", "414–415", "418", "461", "519", "557", "559", "840" ] }, { "name": "Ton80 Communications", "exchanges": 11, "byLineType": { "voip": 11 }, "ranges": [ "546", "627", "737", "742", "767", "782", "832", "865", "887", "889", "942" ] }, { "name": "Melrose Telephone Company", "exchanges": 8, "byLineType": { "fixed_line": 8 }, "ranges": [ "256", "285", "398", "453", "548", "597", "764", "987" ] }, { "name": "Bandwidth.com", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "258", "318", "416", "428", "458", "467", "964" ] }, { "name": "Federated Telephone Cooperative", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "273", "324", "394", "567", "596", "734", "793" ] }, { "name": "Mcc Telephony", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "331", "340", "389", "446", "455", "613", "753" ] }, { "name": "Midcontinent Communications", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "206", "228", "261", "353", "376", "487", "818" ] }, { "name": "Windstream", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "222", "225", "236", "243", "274", "430", "963" ] }, { "name": "Runestone Telephone Association", "exchanges": 6, "byLineType": { "fixed_line": 6 }, "ranges": [ "246", "284", "528", "795", "965", "986" ] }, { "name": "Allstream", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "200", "230", "257", "271", "631" ] }, { "name": "Benton Cooperative Telephone Company", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "294", "355", "387", "393", "556" ] }, { "name": "Emergency Networks", "exchanges": 5, "byLineType": { "mobile": 5 }, "ranges": [ "370", "588", "600", "727", "850" ] }, { "name": "TELNYX", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "390", "426", "457", "480", "888" ] }, { "name": "Tekstar Communications", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "204", "419", "442", "474", "636" ] }, { "name": "Terra Nova Telecom", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "330", "374", "735", "961", "999" ] }, { "name": "Gardonville Cooperative Telephone Association", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "524", "758", "834", "876" ] }, { "name": "Albany Mutual Telephone", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "836–837", "845" ] }, { "name": "Consolidated Telephone Company", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "277", "745", "749" ] }, { "name": "Farmers Mutual Telephone Company", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "568", "668", "752" ] }, { "name": "Hutchinson Telephone Company", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "234", "484", "587" ] }, { "name": "Nuso", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "462–463", "534" ] }, { "name": "Brightlink Communications", "exchanges": 2, "byLineType": { "mobile": 1, "voip": 1 }, "ranges": [ "402", "482" ] }, { "name": "COMMIO LLC", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "475", "867" ] }, { "name": "Clara City Telephone Company", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "367", "847" ] }, { "name": "Farmers Mutual Technologies", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "312", "698" ] }, { "name": "Hometown Solutions", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "585", "849" ] }, { "name": "Hutchinson Telecommunications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "593", "854" ] }, { "name": "WH Link", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "450", "490" ] }, { "name": "8x8", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "880" ] }, { "name": "Access2Go", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "445" ] }, { "name": "CSC Wireless LLC", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "437" ] }, { "name": "CTC", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "639" ] }, { "name": "Callworks Corporation", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "476" ] }, { "name": "Comcast", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "471" ] }, { "name": "Dish Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "473" ] }, { "name": "Exiant", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "869" ] }, { "name": "HD Carrier", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "472" ] }, { "name": "Hancock Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "392" ] }, { "name": "IP Horizon", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "448" ] }, { "name": "Leap Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "520" ] }, { "name": "Local Access Network", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "982" ] }, { "name": "Lowry Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "283" ] }, { "name": "MIDWEST NETWORK SOLUTIONS HUB", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "470" ] }, { "name": "Mainstreet Communications", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "351" ] }, { "name": "NewCore Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "469" ] }, { "name": "Osakis Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "859" ] }, { "name": "Peerless Network", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "452" ] }, { "name": "Sacred Heart Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "765" ] }, { "name": "Skyetel", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "686" ] }, { "name": "Starbuck Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "239" ] }, { "name": "Twilio International", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "895" ] }, { "name": "Upsala Cooperative Telephone Association", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "573" ] }, { "name": "Valley Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "695" ] }, { "name": "Vonage", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "371" ] }, { "name": "Wavenation", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "486" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "521" ] } ], "grid": "fmfffvfvvfvumvfvvmummmfvmfmfffffmffffffffmfffffmmmmfffffffvfmfmmffmmfffffffffffmmfmffffmmfmmmmfmmmmffvvmmmvvvmfufvvfvfvmuvfvffmfffvffmmvmvfmfvvfvfffvmfffffffffmmmmfmfffmfmvmvvmffvffvfffmvfvfvvfffffmffmfmffmmvvfvummffvvffmfvmmmvvvmfmfffmmmmffvfmmvfmvmfvvf-fvvvmmfffvvvvfmmvvmfvvmfmvmv-ffffv-fmmm-fmv-vm------u--mu--vm---fffmffvfvffv-fvfv-v----ffm-vff---m-fuffffv-ffffvfff---ff--m-m--mmff-fmf-ffffvffffm----u-----uuf--f---v-----fv-fmffffvf--fv---v---mffu--ffff------f-v-ff----f-ff-f--mmffv-----ff-f-ffmuu-v-------u---u------f-v-mm----fmfv-vv---vf-ff-ff--ff----ffmmffffmv-f----vm-v-m--v----------f-ff--vv--v-m--m--u---m--f---v---f-m---vff-fffffmffvfffffm-ffff-f-f----fv-v-vf---mfff--v-----fvvv----mv---vv----m----vu-----------v---------v--------v---v---u-u-----uu-v-fvfvff-----f-uvfmmmff--ffu----f-f---v", "patterns": { "all": "^\\+1320[2-9]\\d{6}$", "fixed_line": "^\\+1320(?:2(?:0[02-469]|14|2[257-9]|3[013-9]|4[02-6]|5[1-79]|6[14589]|7[0-8]|8[13-69]|9[49])|3(?:00|1[0257]|2[2457-9]|3[128]|4[035-7]|5[0-8]|6[35-79]|7[679]|8[02-479]|9[2-689])|4(?:0[1349]|1[4589]|21|3[02-49]|4[026]|5[035]|6[1-38]|7[48]|8[4-7]|9[05])|5(?:19|2[0134689]|3[24]|4[2378]|5[46-9]|6[2-57-9]|7[34]|8[4579]|9[1-46-9])|6(?:1[36]|2[69]|3[1-469]|49|5[04-7]|6[489]|7[4679]|8[45]|9[23578])|7(?:22|3[24]|4[35689]|5[2389]|6[2-59]|9[356])|8(?:18|[28]6|3[346-9]|4[0235-9]|5[2-579]|64|7[05-7])|9(?:6[3578]|7[48]|8[2367]|9[35]))\\d{4}$", "mobile": "^\\+1320(?:2(?:01|1[279]|2[0146]|32|4[17-9]|50|6[02367]|79|8[0278]|9[0-35-8])|3(?:0[3-59]|[145]9|26|3[3469]|6[0-248]|7[025]|85|97)|4(?:0[0256]|1[23]|2[03-59]|3[15-8]|4[3479]|59|6[09]|7[0379]|81|9[1-36])|5(?:00|1[05]|[25]2|44|7[79]|8[238])|6(?:[03]0|48|8[23]|99)|7(?:2[67]|33|6[016]|7[59])|8(?:0[58]|15|28|41|50|[79]4)|9(?:05|79|8[01]))\\d{4}$", "voip": "^\\+1320(?:2(?:0[578]|1[0356]|23|58)|3(?:0[126-8]|1[3468]|2[13]|3[057]|4[1248]|7[1348]|8[168]|9[01])|4(?:0[78]|1[067]|2[26-8]|4[158]|5[126-8]|6[4-7]|7[1256]|8[028]|9[79])|5(?:14|2[57]|3[0357]|46|6[06]|95)|6(?:2[07]|35|4[04]|[68]6)|7(?:03|24|3[578]|[48]2|67|7[47]|99)|8(?:0[03]|[23]2|44|6[579]|8[07-9]|9[59])|9(?:[01]0|[23]3|4[26]|6[146]|77|99))\\d{4}$" }, "sandbox": { "input": "+13205550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+13205550123", "international": "+1 320-555-0123", "national": "(320) 555-0123", "rfc3966": "tel:+1-320-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "320", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 320?", "answer": "Area code 320 is in Minnesota, in the United States: all 535 of its exchanges on record are there. From abroad it is dialled +1 320, then the seven-digit number." }, { "question": "Is a 320 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 535 exchanges on record in 320, 123 (23%) were allocated as mobile, 268 (50%) as fixed line, 120 (22%) as VoIP and 24 (4%) 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 320?", "answer": "65 carriers hold exchanges in 320 on record; the most: Lumen (99), Verizon (59) and Onvoy (58). 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 320 phone number?", "answer": "In E.164 a 320 number matches ^\\+1320[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 (320) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-218", "us-507", "us-612", "us-651", "us-763", "us-952" ], "previous": "us-319", "next": "us-321" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 535, "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" } ] } }