{ "url": "https://phonelookup.dev/prefix/us-571", "npa": "571", "slug": "us-571", "iso": "US", "country": "United States", "regions": [ { "code": "VA", "name": "Virginia", "exchanges": 650 } ], "exchanges": 650, "known": 633, "byLineType": { "fixed_line": 166, "mobile": 303, "unknown": 17, "voip": 164 }, "carriers": [ { "name": "Verizon", "exchanges": 153, "byLineType": { "fixed_line": 79, "mobile": 74 }, "ranges": [ "202–205", "218", "223", "226", "231", "248–249", "252", "255–256", "258", "261–262", "266", "270", "272–273", "280", "284", "287", "289", "293", "302", "304–305", "307", "317–318", "324–326", "328–329", "334", "340", "342", "344–346", "349", "351", "353", "357", "359", "361–362", "367", "369", "372", "375", "382–384", "386–387", "389", "392", "401", "405", "408–409", "414", "417", "419", "422–424", "429", "431–432", "434", "439", "442", "447–449", "452", "454–455", "457", "459", "465", "468", "472", "477", "483", "485", "487–488", "490", "494", "497", "499", "506", "512", "515", "522", "528–529", "531", "533", "537", "539–540", "548", "550–551", "557–558", "562", "565", "581", "588", "596", "599", "607–610", "612–614", "616", "619", "623", "633", "642–644", "649", "651", "665", "684", "719", "730–731", "733", "752", "765", "767", "775", "814", "835", "858", "882", "919", "921", "926", "969", "982" ] }, { "name": "T-Mobile", "exchanges": 130, "byLineType": { "mobile": 130 }, "ranges": [ "201", "220–221", "224", "233–235", "237–238", "241", "244–246", "250–251", "253", "259", "263–264", "267–269", "274–279", "283", "285", "288", "295", "298", "300–301", "314–316", "320", "327", "330–332", "337–338", "356", "365", "368", "373", "376", "378", "394", "397–398", "403", "412", "426", "430", "435–437", "440", "443", "458", "462", "464", "466", "474", "478", "484", "489", "491", "508", "516", "518–519", "523", "530", "532", "534", "538", "545–547", "552", "554", "564", "578–580", "584", "587", "589", "591", "594", "597–598", "603–604", "621–622", "631–632", "634–635", "648", "656–657", "661–663", "682", "685", "689", "703", "707–708", "722", "741", "758", "762", "770", "776", "778", "789", "825", "839", "850", "991–992" ] }, { "name": "AT&T", "exchanges": 118, "byLineType": { "fixed_line": 28, "mobile": 90 }, "ranges": [ "212–217", "225", "227–228", "230", "232", "236", "239–240", "242–243", "247", "254", "265", "286", "294", "296", "303", "309", "335", "352", "354–355", "363–364", "366", "381", "391", "393", "413", "420", "425", "428", "456", "460", "469", "471", "476", "480–482", "486", "501–502", "505", "507", "509", "513", "524", "535", "541", "566", "572", "575", "577", "585", "595", "602", "605–606", "618", "624", "627–630", "637–639", "645", "647", "654", "658", "672", "675", "680–681", "683", "690", "692–694", "706", "709", "718", "721", "724–726", "729", "734–735", "737–738", "744–745", "757", "760", "766", "768–769", "782", "784", "801–805", "820–824" ] }, { "name": "Onvoy", "exchanges": 63, "byLineType": { "voip": 63 }, "ranges": [ "200", "290", "350", "410", "444", "500", "503", "517", "520", "526", "549", "556", "561", "568", "570", "576", "582", "586", "590", "601", "615", "640", "646", "650", "652–653", "660", "666–668", "671", "673–674", "678", "686–687", "701", "715–716", "720", "736", "739–740", "743", "747", "751", "753", "756", "761", "764", "771–774", "777", "779–780", "783", "800", "901", "910", "998–999" ] }, { "name": "Bandwidth.com", "exchanges": 25, "byLineType": { "voip": 25 }, "ranges": [ "210", "306", "310", "348", "385", "396", "418", "445", "450", "453", "461", "467", "470", "543", "559–560", "569", "583", "625", "636", "717", "732", "750", "781", "989" ] }, { "name": "Lumen", "exchanges": 21, "byLineType": { "fixed_line": 19, "voip": 2 }, "ranges": [ "222", "260", "281", "291", "297", "341", "343", "347", "388", "415", "421", "446", "495–496", "510", "695", "723", "759", "763", "831", "833" ] }, { "name": "Paetec Itel", "exchanges": 21, "byLineType": { "fixed_line": 21 }, "ranges": [ "209", "229", "282", "292", "299", "321–323", "339", "371", "438", "451", "514", "521", "553", "748–749", "931–934" ] }, { "name": "Comcast", "exchanges": 19, "byLineType": { "voip": 19 }, "ranges": [ "206", "208", "257", "308", "312–313", "319", "333", "358", "379", "395", "407", "492", "527", "542", "659", "830", "918", "970" ] }, { "name": "CoreTel", "exchanges": 12, "byLineType": { "fixed_line": 12 }, "ranges": [ "271", "336", "360", "370", "380", "390", "402", "406", "493", "536", "697", "842" ] }, { "name": "IP Horizon", "exchanges": 11, "byLineType": { "voip": 11 }, "ranges": [ "416", "676", "679", "696", "698", "702", "704–705", "712–714" ] }, { "name": "Fractel", "exchanges": 10, "byLineType": { "voip": 10 }, "ranges": [ "504", "544", "567", "677", "755", "786", "877", "899", "946", "977" ] }, { "name": "Ton80 Communications", "exchanges": 9, "byLineType": { "voip": 9 }, "ranges": [ "626", "688", "727", "742", "746", "788", "832", "837", "866" ] }, { "name": "COMMIO LLC", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "592–593", "664", "670", "867" ] }, { "name": "Peerless Network", "exchanges": 5, "byLineType": { "voip": 5 }, "ranges": [ "441", "498", "620", "799", "888" ] }, { "name": "Brightlink Communications", "exchanges": 4, "byLineType": { "mobile": 2, "voip": 2 }, "ranges": [ "404", "473", "479", "699" ] }, { "name": "Emergency Networks", "exchanges": 4, "byLineType": { "mobile": 4 }, "ranges": [ "563", "573–574", "710" ] }, { "name": "YMax Communications", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "207", "374", "377", "399" ] }, { "name": "TELNYX", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "427", "655" ] }, { "name": "Terra Nova Telecom", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "400", "600" ] }, { "name": "Tpx Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "754", "870" ] }, { "name": "Vonage", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "475", "669" ] }, { "name": "Airus Inc", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "525" ] }, { "name": "American Messaging", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "433" ] }, { "name": "Astound Broadband", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "641" ] }, { "name": "Dish Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "691" ] }, { "name": "Exiant", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "728" ] }, { "name": "Global Net Communications", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "903" ] }, { "name": "Leap Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "571" ] }, { "name": "Nuso", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "617" ] }, { "name": "Twilio International", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "895" ] }, { "name": "USA Mobility", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "219" ] }, { "name": "Voip Street", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "463" ] } ], "grid": "vmmffmvvvfvummmmmmfmmmffmmffmfmfmmmmmmmmmmmmmmmmfmmmfmfmfvfmfffmmmfmmmffffmmmmmmfffmfmmmmmvfffmmmfmfmmmffmvfvmvuvvmmmmmvmffffffmmmmmmvmmfmmfmfmfffmfvfvmmmfmmmvmfffmmmmfmmfffmvfmvmvfmffmvfffmfffmmvvmmvvffmmmfvmmvummffvfvmmfmfmmmvmmmffmfmmmfmmvmmvvfmfmvffvfmmmmmmvmvmmmvfmvmfvmvfmmvmmmfmmmfmmfmvffffmvmvmmvvmffmmvummffmvmmvffmmfvvmmmmmfmmffmfmmvvvmmmmvmfmfmuvffvvvmmmmfvvvvfmmmmvmmmmfvvmmvmfmvmvvmmmmmmvvmmmmmffmfumffvffmmvmmmmvvfmmfmmfmmvffmvffffmvmmfvmvvfvmmmvvmmmvfvvvvvvmvvmvvvvfmmmmmvvvmmmmmmfvfvmuvvmvvmmmmmuvvvvvvfmvmmfmmfvvmmmvmmmvmmvvmvvmmvvffvvmvfvvfmvmvmfvmffmmmvvvvmmvmvvvmvm-v-vm---------vvfffff-----u--m-----fffffm----vfvf-m-v-m--f-------m-------f-------vv--f------v----m-----v------v---vuv-f------vu------vm-f----m----ffff-u---------v---u---u---uu---------mv-----uv----m------v-mm-----vv", "patterns": { "all": "^\\+1571[2-9]\\d{6}$", "fixed_line": "^\\+1571(?:2(?:0[349]|[14]8|2[23679]|31|5[2468]|6[0-26]|7[0-3]|8[0-24]|9[1-379])|3(?:0[347]|2[1-6]|3[69]|4[13-579]|54|6[0-27]|7[0-25]|8[0236-8]|9[0-2])|4(?:0[126]|1[457]|2[13]|3[1248]|4[68]|5[124]|68|7[26]|8[37]|9[03-6])|5(?:0[67]|1[45]|2[125]|3[3679]|5[1378]|66|71|8[18])|6(?:0[78]|1[03467]|27|3[0378]|4[1-49]|54|65|80|9[57])|7(?:18|2[36]|4[89]|5[47]|6[367])|8(?:0[1-5]|2[0-4]|3[13]|42|58|70)|9(?:03|21|3[1-4]))\\d{4}$", "mobile": "^\\+1571(?:2(?:0[125]|1[2-79]|2[01458]|3[02-9]|4[0-79]|5[01359]|6[3-57-9]|7[4-9]|8[35-9]|9[4-68])|3(?:0[0-259]|1[4-8]|2[07-9]|3[0-24578]|4[026]|5[1-35-79]|6[3-689]|7[368]|8[149]|9[3478])|4(?:0[3-589]|1[239]|2[024-689]|3[035-79]|4[02379]|5[5-9]|6[024-69]|7[1478]|8[0-24-689]|9[179])|5(?:0[12589]|1[23689]|2[3489]|3[0-2458]|4[015-8]|5[024]|6[2-5]|7[2-57-9]|8[04579]|9[14-9])|6(?:0[2-69]|1[289]|2[1-489]|3[12459]|4[578]|5[16-8]|6[1-3]|7[25]|8[1-59]|9[0-49])|7(?:0[36-9]|1[09]|2[12459]|3[013-578]|4[145]|5[28]|6[02589]|7[0568]|8[249])|8(?:14|25|3[59]|50|82)|9(?:[16]9|26|82|9[12]))\\d{4}$", "voip": "^\\+1571(?:2(?:0[06-8]|[19]0|57)|3(?:0[68]|1[0239]|33|48|5[08]|7[479]|85|9[569])|4(?:0[07]|1[068]|27|4[145]|5[03]|6[137]|7[0359]|9[28])|5(?:0[034]|1[07]|2[067]|4[2-49]|5[69]|6[017-9]|7[06]|8[236]|9[023])|6(?:0[01]|15|2[056]|36|4[06]|5[02359]|6[046-9]|7[01346-9]|8[6-8]|9[68])|7(?:0[1245]|1[2-7]|2[078]|3[269]|4[02367]|5[013569]|6[14]|7[1-479]|8[01368]|99)|8(?:00|3[027]|6[67]|77|88|9[59])|9(?:01|1[08]|46|7[07]|89|9[89]))\\d{4}$" }, "sandbox": { "input": "+15715550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+15715550123", "international": "+1 571-555-0123", "national": "(571) 555-0123", "rfc3966": "tel:+1-571-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "571", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 571?", "answer": "Area code 571 is in Virginia, in the United States: all 650 of its exchanges on record are there. From abroad it is dialled +1 571, then the seven-digit number." }, { "question": "Is a 571 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 650 exchanges on record in 571, 303 (47%) were allocated as mobile, 166 (26%) as fixed line, 164 (25%) as VoIP and 17 (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 571?", "answer": "32 carriers hold exchanges in 571 on record; the most: Verizon (153), T-Mobile (130) and AT&T (118). 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 571 phone number?", "answer": "In E.164 a 571 number matches ^\\+1571[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 (571) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-276", "us-434", "us-540", "us-686", "us-703", "us-757", "us-804", "us-826", "us-948" ], "previous": "us-570", "next": "us-572" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 650, "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" } ] } }