{ "url": "https://phonelookup.dev/prefix/us-520", "npa": "520", "slug": "us-520", "iso": "US", "country": "United States", "regions": [ { "code": "AZ", "name": "Arizona", "exchanges": 709 } ], "exchanges": 709, "known": 695, "byLineType": { "fixed_line": 318, "mobile": 262, "unknown": 14, "voip": 115 }, "carriers": [ { "name": "Lumen", "exchanges": 233, "byLineType": { "fixed_line": 230, "voip": 3 }, "ranges": [ "202", "205–206", "208–209", "217–219", "222–223", "225–226", "228–229", "232", "243", "246", "254", "258", "281", "285", "287", "290–299", "314", "316", "318–328", "337", "348", "351", "356–357", "363–364", "366", "368–369", "374–375", "377–378", "382", "384–385", "388", "393–394", "397–399", "407–408", "410", "413–414", "417", "421", "423–424", "426", "432–434", "439", "452", "454–459", "463–464", "466", "469", "472", "487", "489", "494–495", "498", "509", "512–516", "519", "529", "531", "533", "538", "542", "544–547", "566", "568", "570–579", "582", "584", "586", "589", "595", "615–618", "620–626", "628–629", "638–640", "647–648", "652", "662–665", "670", "681–682", "689–690", "694–696", "712", "720–724", "731", "733", "740–751", "760–762", "770", "777", "784", "790–795", "797–799", "803", "805–807", "818", "822", "825", "829", "836", "838", "858", "866", "868", "872–874", "876–889", "895–896", "901", "903", "908" ] }, { "name": "Verizon", "exchanges": 131, "byLineType": { "fixed_line": 27, "mobile": 104 }, "ranges": [ "203", "216", "221", "230", "235", "237", "240", "242", "253", "255", "260", "262", "264", "268–269", "279", "282", "284", "289", "300", "305–307", "310", "330", "333–334", "340", "343", "345", "349", "354", "396", "400", "403–405", "419", "425", "429", "437", "444", "449", "451", "453", "471", "477", "483", "488", "490", "496", "507–508", "517", "528", "539", "541", "549", "559", "561", "590–591", "601", "603–604", "609–610", "627", "632–633", "643", "645", "649", "651", "656", "668–669", "671–674", "676", "678–679", "684", "686–687", "691–693", "697–698", "705–709", "713–718", "725", "729–730", "732", "734", "738", "752–754", "759", "780", "820", "827", "833", "840", "849–850", "860", "904", "909", "917–918", "954–955", "975", "987–988", "993" ] }, { "name": "T-Mobile", "exchanges": 95, "byLineType": { "mobile": 95 }, "ranges": [ "213", "220", "227", "234", "236", "238", "244–245", "248–252", "256–257", "265–266", "270–271", "274", "278", "280", "283", "286", "313", "331–332", "359", "365", "370–371", "373", "376", "380", "390", "401–402", "427", "435", "440", "443", "450", "460", "470", "473–474", "479", "481", "491", "499", "504", "534–535", "543", "553", "556", "585", "596", "598", "606", "619", "631", "634–635", "637", "658", "660–661", "701", "728", "757", "763–765", "783", "788–789", "831", "839", "848", "861", "869–870", "891", "921", "940", "965", "971", "977", "979–982", "990–991" ] }, { "name": "AT&T", "exchanges": 68, "byLineType": { "fixed_line": 15, "mobile": 53 }, "ranges": [ "239", "241", "247", "272–273", "275", "288", "301–302", "304", "308–309", "312", "329", "336", "339", "344", "358", "360", "386", "389", "392", "406", "409", "422", "428", "431", "441", "445", "465", "478", "482", "486", "510", "518", "548", "551", "554", "560", "565", "587", "599", "607", "613", "704", "727", "735–736", "756", "767", "808", "834", "837", "841", "851–855", "867", "906–907", "912", "941–945" ] }, { "name": "Onvoy", "exchanges": 47, "byLineType": { "voip": 47 }, "ranges": [ "210", "214", "233", "277", "303", "317", "338", "342", "353", "379", "436", "438", "447", "462", "467–468", "500", "502–503", "506", "520", "523–525", "527", "530", "532", "536", "552", "593", "597", "600", "608", "614", "630", "650", "666", "680", "683", "702", "800", "842–844", "900", "910", "999" ] }, { "name": "Bandwidth.com", "exchanges": 17, "byLineType": { "voip": 17 }, "ranges": [ "231", "261", "276", "355", "442", "485", "497", "540", "605", "612", "653", "657", "719", "775", "779", "812", "815" ] }, { "name": "Allstream", "exchanges": 10, "byLineType": { "fixed_line": 10 }, "ranges": [ "200–201", "224", "352", "381", "391", "461", "505", "924", "989" ] }, { "name": "Fractel", "exchanges": 10, "byLineType": { "voip": 10 }, "ranges": [ "522", "588", "644", "655", "688", "699", "755", "758", "899", "966" ] }, { "name": "Comcast", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "207", "263", "335", "372", "395", "492", "685" ] }, { "name": "Gila River Telecommunications", "exchanges": 7, "byLineType": { "fixed_line": 7 }, "ranges": [ "215", "315", "418", "430", "550", "562", "796" ] }, { "name": "IP Horizon", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "537", "563–564", "567", "569", "581", "583" ] }, { "name": "Ton80 Communications", "exchanges": 7, "byLineType": { "voip": 7 }, "ranges": [ "641", "646", "772", "929", "934", "949", "994" ] }, { "name": "Valley Telephone Cooperative", "exchanges": 6, "byLineType": { "fixed_line": 6 }, "ranges": [ "558", "642", "824", "826", "845", "847" ] }, { "name": "Emergency Networks", "exchanges": 5, "byLineType": { "mobile": 5 }, "ranges": [ "367", "580", "602", "710", "739" ] }, { "name": "Peerless Network", "exchanges": 4, "byLineType": { "voip": 4 }, "ranges": [ "346", "412", "448", "636" ] }, { "name": "COMMIO LLC", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "526", "557", "654" ] }, { "name": "TELNYX", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "341", "347", "592" ] }, { "name": "Tohono O'Odham Utility Authority", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "361–362", "383" ] }, { "name": "Allo Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "737", "785" ] }, { "name": "Brightlink Communications", "exchanges": 2, "byLineType": { "mobile": 1, "voip": 1 }, "ranges": [ "476", "484" ] }, { "name": "Dish Wireless", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "675", "677" ] }, { "name": "HD Carrier", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "420", "521" ] }, { "name": "Midvale Telephone Exchange", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "212", "898" ] }, { "name": "North County Communications", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "259", "267" ] }, { "name": "Nuso", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "659", "667" ] }, { "name": "Ahoi", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "922" ] }, { "name": "CSC Wireless LLC", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "475" ] }, { "name": "Callworks Corporation", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "703" ] }, { "name": "Exiant", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "416" ] }, { "name": "FirstDigital", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "493" ] }, { "name": "Gila Local Exchange Carrier", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "350" ] }, { "name": "Leap Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "802" ] }, { "name": "Mcc Telephony", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "415" ] }, { "name": "Paetec Itel", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "204" ] }, { "name": "TDS Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "823" ] }, { "name": "Table Top Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "387" ] }, { "name": "Twilio International", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "501" ] }, { "name": "USA Mobility", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "446" ] }, { "name": "Valley Connections", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "766" ] }, { "name": "Vonage", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "771" ] }, { "name": "Wavenation", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "594" ] }, { "name": "West Telecom", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "809" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "801" ] } ], "grid": "fffffffvffvufmvfmfffmmfffffmffmvfvmmmmmfmmmfmmfmmmmmmmfmmmffmvmvmmmfmmmmmmmmvvmmmfmmffmfmmffffffffffmmmvmmmmmmmummfffvffffffffffffmmmfmvmfvmmvvmmmvvvmfffvmvffmmmffffmfmffmmvmffmffvmfffffmffmmfmffvmfffmmmmmmmffmfuvfffvffmvffffmfmmmfmfffmvfvfmmvmmmmvvmmmfmffffffmfvffmfvvfmmfmmmvffm-mmmmvmfmfmmvfffmvfmvvvvmfvmmfmufffffmmfvvvvvvvvmfvfvfmmvvfmvmfmffffmmfmvmmumvfmmmfvvmfvfvffffffffffmvfvfmfmvfmmvvfvmvmmvmmmmvmmvmmuvmvffffmfffffffmffvmmmmmvmfvfvfmvmvffmvmfvvvmvmfmmffffvfmffffffmmmmmvffvfvmfvffffffffmmvumvvmmfffmmufffffffvffffff-mmmmfmfmmmfmmffffffffffffmmmvmmvmfffmmmfm--fvv--v-f-vm--mff--mmffffffffffvfff-fffmf-uv--v--f-m-fffffm-f-m-mm-fffmmmvvvf-fmmmfffff--f-mm----fmfmm-fff-ffffffffffffff-m---ff-fvvf-fm-mmfmvum----ff--mf-f----v----v-----mfffff---vu---mm--uu-----mv----m---mum-mmmm----mmfmm-mv----v", "patterns": { "all": "^\\+1520[2-9]\\d{6}$", "fixed_line": "^\\+1520(?:2(?:0[0-689]|1[257-9]|2[2-689]|3[29]|4[36]|5[489]|67|8[1457]|9\\d)|3(?:1[4-689]|2\\d|3[37]|5[0-267]|6[1-4689]|7[4578]|8[1-578]|9[1347-9])|4(?:0[78]|1[03-578]|2[1-46]|3[02-479]|5[24-9]|6[13469]|7[278]|8[79]|9[3-58])|5(?:0[59]|1[2-69]|29|3[138]|4[24-7]|5[08]|6[268]|7\\d|8[2469]|94)|6(?:1[5-8]|2[0-689]|38|4[0278]|5[29]|6[2-579]|7[0-4]|8[12479]|9[0-6])|7(?:0[6-8]|1[2-8]|2[0-5]|3[137]|[49]\\d|5[01]|6[0-26]|7[07]|8[45])|8(?:0[1-35-79]|18|2[2-69]|3[6-8]|4[57]|5[1-58]|6[68]|7[2-46-9]|8\\d|9[568])|9(?:0[138]|1[78]|2[24]|4[1-5]|89))\\d{4}$", "mobile": "^\\+1520(?:2(?:1[36]|2[017]|3[04-8]|4[0-2457-9]|5[0-35-7]|6[024-689]|7[0-589]|8[023689])|3(?:0[0-24-9]|1[023]|3[0-2469]|4[03-59]|5[489]|6[057]|7[0136]|8[069]|9[026])|4(?:0[0-69]|19|2[57-9]|3[15]|4[013-69]|5[013]|6[05]|7[013-59]|8[1-468]|9[0169])|5(?:0[478]|1[078]|28|3[459]|4[1389]|5[13469]|6[015]|8[057]|9[01689])|6(?:0[1-4679]|1[039]|27|3[1-57]|4[359]|5[168]|6[018]|7[5-9]|86|9[78])|7(?:0[1459]|10|2[7-9]|3[024-689]|5[2-4679]|6[3-57]|8[0389])|8(?:08|2[07]|3[1349]|4[0189]|[57]0|6[0179]|91)|9(?:0[4679]|12|21|40|5[45]|65|7[1579]|8[0-278]|9[013]))\\d{4}$", "voip": "^\\+1520(?:2(?:07|1[04]|[36][13]|7[67])|3(?:03|17|3[58]|4[126-8]|5[35]|7[29]|95)|4(?:1[26]|20|3[68]|[46][278]|76|85|9[27])|5(?:0[0-36]|2[0-7]|3[0267]|40|5[27]|6[3479]|8[138]|9[2357])|6(?:0[058]|1[24]|3[069]|4[146]|5[03-57]|66|8[0358]|99)|7(?:0[23]|19|5[58]|7[1259])|8(?:00|1[25]|4[2-4]|99)|9(?:[01]0|[24]9|34|66|9[49]))\\d{4}$" }, "sandbox": { "input": "+15205550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+15205550123", "international": "+1 520-555-0123", "national": "(520) 555-0123", "rfc3966": "tel:+1-520-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "520", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 520?", "answer": "Area code 520 is in Arizona, in the United States: all 709 of its exchanges on record are there. From abroad it is dialled +1 520, then the seven-digit number." }, { "question": "Is a 520 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 709 exchanges on record in 520, 262 (37%) were allocated as mobile, 318 (45%) as fixed line, 115 (16%) 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 520?", "answer": "43 carriers hold exchanges in 520 on record; the most: Lumen (233), Verizon (131) and T-Mobile (95). 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 520 phone number?", "answer": "In E.164 a 520 number matches ^\\+1520[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 (520) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-480", "us-602", "us-623", "us-928" ], "previous": "ca-519", "next": "us-530" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 709, "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" } ] } }