{ "url": "https://phonelookup.dev/prefix/us-401", "npa": "401", "slug": "us-401", "iso": "US", "country": "United States", "regions": [ { "code": "RI", "name": "Rhode Island", "exchanges": 630 } ], "exchanges": 630, "known": 595, "byLineType": { "fixed_line": 336, "mobile": 155, "unknown": 35, "voip": 104 }, "carriers": [ { "name": "Verizon", "exchanges": 242, "byLineType": { "fixed_line": 200, "mobile": 42 }, "ranges": [ "202", "209", "220", "222", "224", "227–229", "231–235", "242–243", "245–247", "249", "253–254", "256", "258", "262", "267–268", "272–278", "280", "282", "290", "294–295", "302", "318", "321–322", "326", "331", "333–335", "337", "340–341", "348", "351", "353–354", "357", "364", "370", "374", "377–378", "392–393", "397", "406", "408", "420–421", "423–424", "430–435", "437–439", "444", "447", "449–450", "453–459", "461–468", "472–474", "477", "479–480", "484", "486–487", "489", "500", "521–522", "524–525", "528–529", "533", "536", "539", "541", "545", "553", "563", "567–568", "574–575", "578", "581", "585", "588", "591", "595–596", "598", "601–602", "621", "624–625", "635", "642", "644", "647", "649", "658", "661", "665", "682–683", "721–729", "732", "734", "736–739", "741–742", "745", "751–752", "754", "757", "762–763", "765–770", "772–773", "776", "780–789", "792–793", "808", "814", "821–823", "825–828", "831–832", "840–843", "845–849", "851", "854", "856", "861–865", "867–868", "871", "874", "884–886", "888", "920", "934", "941–944", "946", "949", "960", "968", "970", "986–987" ] }, { "name": "T-Mobile", "exchanges": 71, "byLineType": { "mobile": 71 }, "ranges": [ "203", "206–207", "212", "219", "226", "241", "252", "255", "261", "263", "265", "269", "286", "297", "299", "300–301", "306", "309", "327", "332", "345–346", "359", "362", "376", "389–391", "394", "403", "413", "416", "418–419", "422", "425–426", "481", "492", "497", "499", "516", "538", "540", "548", "559", "564", "572", "579", "612", "617", "623", "639–641", "660", "662–663", "677–678", "692", "744", "837", "855", "919", "952", "954", "996", "999" ] }, { "name": "Paetec Itel", "exchanges": 65, "byLineType": { "fixed_line": 65 }, "ranges": [ "217–218", "223", "230", "257", "304", "312", "319–320", "324", "330", "352", "360", "365–367", "375", "380–381", "384", "387", "402", "404", "410", "412", "415", "427", "471", "483", "488", "490", "495", "515", "519", "531", "534", "558", "562", "583", "586", "589", "599", "604", "606", "608", "616", "628", "633", "643", "656", "659", "671", "675", "679", "681", "691", "694", "696", "699", "709", "712", "719", "775", "777", "834" ] }, { "name": "AT&T", "exchanges": 63, "byLineType": { "fixed_line": 31, "mobile": 32 }, "ranges": [ "215–216", "225", "236–237", "244", "248", "250", "260", "264", "266", "279", "281", "287–288", "292", "305", "307–308", "316", "323", "336", "338–339", "343", "368–369", "372", "388", "409", "440–442", "451", "498", "523", "527", "532", "535", "546", "551", "556–557", "569–570", "573", "580", "636", "645", "651–652", "654", "688", "733", "743", "749", "824", "835", "924", "932", "935", "965", "998" ] }, { "name": "Comcast", "exchanges": 35, "byLineType": { "voip": 35 }, "ranges": [ "205", "213", "240", "270", "284", "289", "293", "315", "349", "356", "383", "385", "396", "398", "405", "443", "475", "491", "552", "560", "584", "592", "597", "615", "619", "632", "637", "667", "710", "714", "753", "764", "816", "921", "992" ] }, { "name": "Lumen", "exchanges": 33, "byLineType": { "fixed_line": 32, "voip": 1 }, "ranges": [ "239", "283", "285", "298", "314", "329", "342", "344", "371", "379", "428", "470", "485", "526", "537", "542–543", "566", "594", "622", "626", "646", "648", "655", "684–685", "702", "795", "829–830", "859", "889", "903" ] }, { "name": "Onvoy", "exchanges": 33, "byLineType": { "voip": 33 }, "ranges": [ "200", "210", "238", "271", "313", "347", "373", "386", "399", "417", "446", "448", "469", "476", "496", "549", "561", "593", "610", "618", "620", "638", "715", "735", "740", "756", "800", "804", "812", "858", "896", "910", "922" ] }, { "name": "Bandwidth.com", "exchanges": 13, "byLineType": { "voip": 13 }, "ranges": [ "310", "325", "350", "358", "363", "400", "452", "460", "478", "482", "544", "680", "872" ] }, { "name": "COMMIO LLC", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "328", "530", "990" ] }, { "name": "Emergency Networks", "exchanges": 3, "byLineType": { "mobile": 3 }, "ranges": [ "303", "407", "600" ] }, { "name": "Peerless Network", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "214", "666", "937" ] }, { "name": "TELNYX", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "204", "317", "361" ] }, { "name": "USA Mobility", "exchanges": 3, "byLineType": { "mobile": 3 }, "ranges": [ "221", "933", "938" ] }, { "name": "Dish Wireless", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "201", "445" ] }, { "name": "Fractel", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "355", "955" ] }, { "name": "HD Carrier", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "395", "799" ] }, { "name": "Nuso", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "429", "436" ] }, { "name": "Ton80 Communications", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "587", "746" ] }, { "name": "Ahoi", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "758" ] }, { "name": "Airus Inc", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "414" ] }, { "name": "American Messaging", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "582" ] }, { "name": "CSC Wireless LLC", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "291" ] }, { "name": "Exiant", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "208" ] }, { "name": "Hypercube Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "296" ] }, { "name": "IP Horizon", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "382" ] }, { "name": "Terra Nova Telecom", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "900" ] }, { "name": "Tpx Communications", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "547" ] }, { "name": "Twilio International", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "895" ] }, { "name": "Voice Application Network", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "251" ] }, { "name": "Vonage", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "259" ] }, { "name": "Wavenation", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "571" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "771" ] }, { "name": "YMax Communications", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "603" ] } ], "grid": "vmfmvvmmvmvumvvffffmfmfffmmfffffffffffvfvmfffffffffvmffmmfmvfmfmfmmffmvvffffffffmfffvfmffvfmfvfffmfmmmmmffmffmvufvfvmvmffffmfvfmvfffmfffffmmmffffmmvfvvffffvvfvmfvmvffffmmfffvmfmfmfffvvfvvffmmmffmvvfvvvufmfvmmmffufmffmvmmffmffmmfffmffffffffmmmmvfmvmvmfmvfffffffvffffmfffvvfffmvvfvmmmvfffmmfmfvm--fvmfmmuuuuuuuuuuu-uufmuuf-ffmmffmfmvffmffmfmfmfffvmmfmvufvf-umffmvvffm-fffmmfmmff--mmmfmfvmfvff-mvvfmfvffmmmvf-f-f-vum--vfmvvvffmfff-f---vf-fmvvmmmffmffffm-mf-mff-ffmfmm-fvv---f---f-mmfvfffff--m--fm-f-f--fu-f------fvuf-vv---f-fffffffff--fffvffffvmmmmfv--m-ffvf-vff---ffvfffffffffufff--ffffffffff--ff-f---vv---v---m--uv-f-v----ffffffffffff-fm-m--ffffufffff-f--fmf-vfufmfmf-ff--mv-f---------fff-ff-----vv---v--f------vu-------mfvv-m-------mmfm-vm-uffff-f--fu-m-mv--uuf----m--f-f-----u---------ffu-v-v---m-mm", "patterns": { "all": "^\\+1401[2-9]\\d{6}$", "fixed_line": "^\\+1401(?:2(?:02|1[5-8]|2[02-47-9]|3[0-79]|[47][2-9]|5[0347]|6[02478]|8[1-3578]|9[024-68])|3(?:0[4578]|1[249]|2[0-2469]|3[013-7]|4[1-48]|5[1-47]|6[04-7]|7[0-2579]|8[01478]|9[237])|4(?:0[249]|1[0245]|2[01347-9]|3[1-8]|44|5[03-9]|6[1-46-8]|7[1-37]|8[3-58]|9[058])|5(?:1[59]|2[12568]|3[124579]|4[1-37]|5[1378]|6[236-8]|7[145]|8[13689]|9[4689])|6(?:0[468]|16|2[124-68]|3[35]|4[235-8]|5[25689]|6[15]|7[159]|8[1-5]|9[1469])|7(?:[01][29]|2[1-9]|3[2-46-9]|45|5[12478]|6[235-9]|7[0-35-7]|8\\d|9[235])|8(?:[17]4|2[1-9]|3[0-24]|4[0-35-9]|5[1469]|6[13578]|8[4-689])|9(?:03|[27]0|34|4[1-469]|6[08]|8[67]))\\d{4}$", "mobile": "^\\+1401(?:2(?:0[13679]|1[29]|2[156]|41|5[2568]|6[13569]|8[06]|9[179])|3(?:0[0-369]|1[68]|2[37]|[36][289]|4[056]|[58]9|7[468]|9[014])|4(?:0[36-8]|1[3689]|2[256]|3[09]|4[0-2579]|51|65|7[49]|8[01679]|9[279])|5(?:00|16|2[3479]|3[368]|4[0568]|5[69]|6[49]|7[02389]|8[025]|9[15])|6(?:0[0-2]|1[27]|23|3[69]|4[0149]|5[14]|6[023]|7[78]|88|92)|74[1-49]|8(?:08|3[57]|55|6[24]|71)|9(?:19|24|3[2358]|5[24]|65|9[689]))\\d{4}$", "voip": "^\\+1401(?:2(?:0[0458]|1[034]|38|40|5[19]|7[01]|8[49]|93)|3(?:1[0357]|2[58]|4[79]|5[0568]|6[13]|73|8[2356]|9[5689])|4(?:0[05]|17|4[368]|[58]2|6[09]|7[0568]|9[16])|5(?:30|4[49]|52|6[01]|8[47]|9[237])|6(?:03|1[0589]|[28]0|3[278]|6[67])|7(?:1[045]|35|4[06]|5[36]|64|99)|8(?:0[04]|1[26]|58|72|9[56])|9(?:[01]0|2[12]|37|55|9[02]))\\d{4}$" }, "sandbox": { "input": "+14015550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+14015550123", "international": "+1 401-555-0123", "national": "(401) 555-0123", "rfc3966": "tel:+1-401-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "401", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 401?", "answer": "Area code 401 is in Rhode Island, in the United States: all 630 of its exchanges on record are there. From abroad it is dialled +1 401, then the seven-digit number." }, { "question": "Is a 401 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 630 exchanges on record in 401, 155 (25%) were allocated as mobile, 336 (53%) as fixed line, 104 (17%) as VoIP and 35 (6%) 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 401?", "answer": "33 carriers hold exchanges in 401 on record; the most: Verizon (242), T-Mobile (71) and Paetec Itel (65). 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 401 phone number?", "answer": "In E.164 a 401 number matches ^\\+1401[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 (401) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [], "previous": "us-386", "next": "us-402" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 630, "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" } ] } }