{ "url": "https://phonelookup.dev/prefix/us-321", "npa": "321", "slug": "us-321", "iso": "US", "country": "United States", "regions": [ { "code": "FL", "name": "Florida", "exchanges": 515 } ], "exchanges": 515, "known": 501, "byLineType": { "fixed_line": 202, "mobile": 204, "unknown": 14, "voip": 95 }, "carriers": [ { "name": "AT&T", "exchanges": 141, "byLineType": { "fixed_line": 83, "mobile": 52, "voip": 6 }, "ranges": [ "213", "225", "230", "235–236", "242", "245", "247", "253–255", "258–259", "264", "266–269", "272", "289", "294", "298", "325", "327–328", "334", "339", "352", "361", "378", "383", "385", "388", "392", "398", "409", "412", "416", "419", "426–428", "431–434", "448–449", "452–456", "459", "462", "470–471", "480", "482", "487", "489", "492", "498", "501", "504–507", "512", "518–520", "528", "530–532", "536–537", "543–544", "578", "603–604", "607–610", "613", "615", "617", "631–639", "652", "666", "674", "676", "690", "698", "720", "722–730", "733", "749–752", "757", "759", "768", "773", "777", "779", "783–784", "794", "799", "837", "841–843", "868", "951–953", "956", "984", "986" ] }, { "name": "T-Mobile", "exchanges": 110, "byLineType": { "mobile": 110 }, "ranges": [ "201", "208", "216–217", "220", "223", "228–229", "231", "240", "261–262", "265", "271", "276–280", "287–288", "291", "297", "299", "302–306", "310", "314–316", "318", "324", "330–331", "335", "337", "340", "343", "347", "353", "356", "359", "362–363", "365", "367–368", "371", "374–375", "377", "387", "389", "391", "393", "403–404", "418", "420", "422", "424", "430", "436", "438–440", "443", "447", "458", "464", "466–467", "469", "503", "508", "517", "525", "527", "558", "591", "594", "614", "616", "624", "662–663", "682", "689", "695–696", "745–746", "795", "805–806", "863", "888", "895", "917", "945–948", "960–961", "987", "999" ] }, { "name": "Lumen", "exchanges": 49, "byLineType": { "fixed_line": 47, "voip": 2 }, "ranges": [ "202–203", "205", "207", "233–234", "239", "248", "250", "252", "263", "308–309", "323", "326", "332", "338", "348", "360", "394", "413–414", "435", "441–442", "450", "460", "473", "476", "494", "549", "557", "593", "622", "677", "684", "697", "710", "754", "800", "802", "848", "853", "861", "867", "914", "926", "978", "985" ] }, { "name": "Paetec Itel", "exchanges": 46, "byLineType": { "fixed_line": 46 }, "ranges": [ "206", "212", "214–215", "218–219", "221–222", "226", "238", "244", "249", "256–257", "260", "273–275", "319", "322", "369", "395–397", "401–402", "406", "421", "437", "500", "541", "559", "567", "576", "600", "735", "747", "775", "785", "821", "832", "866", "872", "890", "972", "989" ] }, { "name": "Onvoy", "exchanges": 39, "byLineType": { "voip": 39 }, "ranges": [ "204", "321", "382", "405", "407", "410", "465", "472", "475", "478", "481", "483", "488", "490–491", "496–497", "502", "509–510", "513", "521–524", "526", "533–534", "538–539", "542", "545", "551", "621", "641", "655", "701", "732", "900" ] }, { "name": "Verizon", "exchanges": 39, "byLineType": { "fixed_line": 13, "mobile": 26 }, "ranges": [ "210", "243", "246", "251", "281–286", "290", "292–293", "296", "301", "307", "313", "317", "320", "354–355", "370", "376", "390", "400", "408", "423", "445–446", "451", "468", "474", "479", "493", "514", "574", "626", "693", "704" ] }, { "name": "Bandwidth.com", "exchanges": 16, "byLineType": { "voip": 16 }, "ranges": [ "200", "237", "241", "300", "312", "344", "351", "364", "379–380", "417", "429", "461", "495", "529", "586" ] }, { "name": "Fractel", "exchanges": 15, "byLineType": { "voip": 15 }, "ranges": [ "342", "346", "372", "399", "477", "566", "587–588", "599", "667", "758", "788", "844", "966", "977" ] }, { "name": "Emergency Networks", "exchanges": 6, "byLineType": { "mobile": 6 }, "ranges": [ "357", "386", "550", "770", "780", "850" ] }, { "name": "Bhn Ip Enabled Services", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "345", "349–350", "425", "804" ] }, { "name": "COMMIO LLC", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "463", "484–486", "878" ] }, { "name": "Peerless Network", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "209", "415", "499", "577", "988" ] }, { "name": "Terra Nova Telecom", "exchanges": 4, "byLineType": { "mobile": 4 }, "ranges": [ "333", "336", "444", "877" ] }, { "name": "IP Horizon", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "366", "515–516" ] }, { "name": "Smart City Communications", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "329", "830–831" ] }, { "name": "Comcast", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "270", "295" ] }, { "name": "Network Services", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "881", "883" ] }, { "name": "ORLANDO TELEPHONE COMPANY", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "765–766" ] }, { "name": "USA Mobility", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "227", "232" ] }, { "name": "ABC Paging", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "224" ] }, { "name": "CoreTel", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "384" ] }, { "name": "Dish Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "381" ] }, { "name": "Smart City Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "939" ] }, { "name": "Supra Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "373" ] }, { "name": "TELNYX", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "358" ] }, { "name": "Vonage", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "341" ] } ], "grid": "vmfvvfffmvmufmffmmffmffmmffmmmmmmfffvvffmvfmfvmvffffffffffmffmmffmmfffvmffffmmmmmffffffmmmmmmfmvfmmmvmmmmmmmffmuvmmmmmmfmvffmvffffmmfmmmmmfmmvvmvfvmfffvvmfmmmvmffmmvmvmmfmmvfmmmmmvvmvfffmmfmmmfmffffmvfffmmvfvmfvumffvmvmmmfmmmffmvvmmmfffmfmmmffmmfmmmffmfffff-mffvmvmvmmmmmmvfmvfvvmmvmvvvvmvmvvmmfvvvmvfmvmfmmmmvvumvmvvmmmmvvvvmvmmvmmmvv-mmvv-fvmmv---fmv---u-fmf------vf------f-fvm-------vvv--m-fm----vf--ff--ffffu-fmfmf---vf-m-m----fffffffff-v----------m--v------mm--mv------f-ff----m-f----mf--m-mmfm-uv--m-----fu--------m-fffffffff-vf-f---------mmf-mmff-f--fvm-----ff-f-m--f-f-f-fm--fff--v-----mm---ff-v-fmm----u---------f--------fff----f---fffv---f-m--f-------f-m--fff---f----mv--m-m----m-f----m----v----------u--f--m--------f------------f-----mmmm-ufff--f-uumm----v-----f---uvf-----fffmvf---------m", "patterns": { "all": "^\\+1321[2-9]\\d{6}$", "fixed_line": "^\\+1321(?:2(?:0[25-7]|1[24589]|2[1256]|3[3-589]|4[2489]|5[0-79]|6[0347-9]|7[2-5]|8[1-6]|9[36])|3(?:0[89]|19|2[236-9]|3[28]|4[589]|5[04]|6[019]|73|8[3-58]|9[24-7])|4(?:0[0-269]|1[34]|2[156]|3[3-57]|4[1259]|5[02-69]|60|7[36]|94)|5(?:0[04]|4[19]|5[79]|67|7[46]|93)|6(?:0[0347-9]|1[0357]|22|3[1-9]|7[467]|84|9[07])|7(?:10|2[2-9]|3[035]|47|5[1247]|6[568]|7[3579]|8[3-5]|99)|8(?:0[04]|21|3[0-27]|4[1-38]|53|6[16-8]|72|90)|9(?:14|26|39|5[1-36]|7[28]|8[4-69]))\\d{4}$", "mobile": "^\\+1321(?:2(?:0[18]|1[0367]|2[0347-9]|3[0-2]|4[036]|58|6[1256]|7[16-9]|8[07-9]|9[0-247-9])|3(?:0[1-7]|1[03-8]|2[04]|3[013-79]|4[037]|5[35-79]|6[23578]|7[014-8]|8[1679]|9[0138])|4(?:0[348]|1[2689]|2[02-47]|3[0-2689]|4[0346-8]|5[18]|6[246-9]|7[0149]|8[0279]|9[238])|5(?:0[135-8]|1[247-9]|2[0578]|3[0-267]|4[34]|5[08]|78|9[14])|6(?:[12][46]|52|6[236]|8[29]|9[3568])|7(?:04|[278]0|4[569]|5[09]|9[45])|8(?:0[56]|50|63|77|8[138]|95)|9(?:[18]7|4[5-8]|6[01]|99))\\d{4}$", "voip": "^\\+1321(?:2(?:0[0349]|3[67]|4[157]|70|95)|3(?:00|12|2[15]|4[1246]|5[128]|6[46]|7[29]|8[02]|99)|4(?:0[57]|1[057]|2[89]|6[135]|7[2578]|8[13-68]|9[015-79])|5(?:0[29]|1[0356]|2[1-469]|3[3489]|4[25]|51|66|77|8[6-8]|99)|6(?:[24]1|55|67)|7(?:01|32|[58]8)|8(?:02|44|78)|9(?:00|66|77|88))\\d{4}$" }, "sandbox": { "input": "+13215550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+13215550123", "international": "+1 321-555-0123", "national": "(321) 555-0123", "rfc3966": "tel:+1-321-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "321", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 321?", "answer": "Area code 321 is in Florida, in the United States: all 515 of its exchanges on record are there. From abroad it is dialled +1 321, then the seven-digit number." }, { "question": "Is a 321 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 515 exchanges on record in 321, 204 (40%) were allocated as mobile, 202 (39%) as fixed line, 95 (18%) 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 321?", "answer": "26 carriers hold exchanges in 321 on record; the most: AT&T (141), T-Mobile (110) and Lumen (49). 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 321 phone number?", "answer": "In E.164 a 321 number matches ^\\+1321[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 (321) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-239", "us-305", "us-352", "us-386", "us-407", "us-448", "us-561", "us-645", "us-656", "us-689", "us-727", "us-728", "us-754", "us-772", "us-786", "us-813", "us-850", "us-863", "us-904", "us-941", "us-954" ], "previous": "us-320", "next": "us-323" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 515, "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" } ] } }