{ "url": "https://phonelookup.dev/prefix/us-631", "npa": "631", "slug": "us-631", "iso": "US", "country": "United States", "regions": [ { "code": "NY", "name": "New York", "exchanges": 799 } ], "exchanges": 799, "known": 784, "byLineType": { "fixed_line": 520, "mobile": 195, "unknown": 15, "voip": 69 }, "carriers": [ { "name": "Verizon", "exchanges": 340, "byLineType": { "fixed_line": 296, "mobile": 44 }, "ranges": [ "200", "204–209", "216", "218–219", "221–226", "228–229", "231–235", "241–244", "246", "249", "252–254", "258–267", "269–274", "277", "281–289", "293", "298", "300", "304", "316", "318–319", "321", "323–326", "329", "331", "335", "338", "341–342", "344–345", "348", "350–351", "357–358", "360–361", "363", "366–369", "372", "376", "379", "382", "385", "391", "395", "399", "403", "405", "412", "416", "418–425", "427", "432", "434–436", "444", "447", "451", "454", "456", "459–462", "467–468", "471–478", "481", "487", "489", "491–493", "495", "499", "501", "506", "508", "510", "514", "528", "531", "533–534", "537", "541", "543–544", "547–549", "551", "553", "560", "563", "567", "576–577", "580–589", "595–599", "602", "609", "616–617", "621", "624", "626", "628", "632", "637–638", "642–644", "652–654", "661", "665–669", "673–674", "677–679", "683", "687", "689", "691–692", "694", "696", "698–699", "706", "708", "716", "721–728", "732", "734", "736–740", "744", "749", "751–758", "763", "765–766", "769–770", "776–778", "780–781", "783", "785–786", "789", "791", "793", "795", "797–799", "804", "806–807", "820–821", "826", "832", "834", "837", "841–845", "847–848", "850–854", "857–864", "869", "873–874", "878–879", "883–884", "888", "890", "892–893", "898", "904–905", "907", "910", "912–913", "921", "924", "928–929", "932", "936", "941–942", "947", "951–953", "955–957", "962–964", "968–969", "978–979", "981–983", "987", "993", "995" ] }, { "name": "AT&T", "exchanges": 87, "byLineType": { "fixed_line": 38, "mobile": 49 }, "ranges": [ "213", "239", "245", "247", "255–256", "305", "307", "310", "312", "317", "327", "332", "347", "370", "374–375", "377", "380", "387", "401", "404", "413", "437", "457", "503", "512", "524", "538", "559", "561", "579", "601", "605", "607", "619", "623", "636", "639", "655", "662", "680–682", "688", "690", "693", "697", "701", "704", "712", "715", "729", "741–742", "745", "747", "760", "784", "787", "792", "823", "827", "835", "838", "866", "871", "875", "880–881", "894", "897", "902–903", "914", "918", "923", "927", "935", "946", "960", "965", "973", "988", "991", "994", "997" ] }, { "name": "T-Mobile", "exchanges": 85, "byLineType": { "mobile": 85 }, "ranges": [ "215", "220", "275–276", "278", "290–291", "294", "303", "308", "334", "336", "352", "355–356", "365", "371", "381", "383–384", "394", "398", "408", "426", "428", "431", "433", "445", "448–449", "452", "455", "463", "484", "494", "507", "523", "530", "552", "565", "572", "575", "578", "640", "645", "660", "664", "671–672", "703", "718", "720", "746", "748", "764", "767", "774", "790", "796", "805", "809", "816", "829", "831", "833", "836", "839", "855", "872", "877", "882", "885", "889", "896", "901", "906", "922", "926", "933–934", "939", "943", "948–949", "974" ] }, { "name": "Lumen", "exchanges": 56, "byLineType": { "fixed_line": 55, "voip": 1 }, "ranges": [ "236", "240", "251", "292", "295", "306", "337", "354", "378", "415", "440", "443", "458", "466", "479", "485", "496", "513", "517", "520–521", "525", "536", "546", "566", "569–570", "590", "593", "610", "612", "615", "618", "649", "657", "702", "707", "709", "714", "731", "759", "762", "771", "808", "813", "815", "830", "840", "865", "867", "876", "899", "925", "938", "961", "972" ] }, { "name": "Cablevision Lightpath", "exchanges": 55, "byLineType": { "fixed_line": 55 }, "ranges": [ "237", "257", "309", "313", "330", "390", "393", "396", "414", "417", "439", "465", "469–470", "486", "539", "591–592", "608", "620", "622", "627", "630", "634–635", "647–648", "650", "656", "659", "663", "670", "675", "686", "710", "719", "730", "750", "761", "772", "775", "801", "803", "818", "828", "846", "849", "868", "886", "909", "920", "940", "992", "996", "998" ] }, { "name": "Onvoy", "exchanges": 37, "byLineType": { "voip": 37 }, "ranges": [ "201–203", "212", "302", "349", "400", "450", "497", "500", "515–516", "526", "529", "540", "557", "600", "613–614", "625", "646", "685", "705", "800", "810", "814", "817", "895", "900", "919", "945", "970", "975", "977", "980", "985–986" ] }, { "name": "Paetec Itel", "exchanges": 32, "byLineType": { "fixed_line": 32 }, "ranges": [ "210", "227", "297", "299", "328", "333", "364", "386", "389", "410", "498", "532", "564", "574", "603", "633", "713", "768", "773", "782", "794", "802", "812", "822", "824", "870", "887", "891", "930", "944", "967", "971" ] }, { "name": "Optimum", "exchanges": 30, "byLineType": { "fixed_line": 30 }, "ranges": [ "214", "238", "250", "296", "315", "320", "343", "388", "392", "446", "482", "488", "504", "509", "522", "527", "562", "573", "594", "604", "606", "629", "651", "658", "676", "743", "779", "856", "908", "937" ] }, { "name": "Peerless Network", "exchanges": 13, "byLineType": { "voip": 13 }, "ranges": [ "230", "248", "268", "359", "429–430", "518–519", "535", "545", "571", "684", "735" ] }, { "name": "Bandwidth.com", "exchanges": 12, "byLineType": { "voip": 12 }, "ranges": [ "339", "346", "353", "397", "407", "438", "464", "505", "631", "641", "825", "954" ] }, { "name": "USA Mobility", "exchanges": 9, "byLineType": { "mobile": 9 }, "ranges": [ "279", "322", "340", "373", "441–442", "554", "558", "695" ] }, { "name": "Telengy", "exchanges": 6, "byLineType": { "fixed_line": 6 }, "ranges": [ "402", "480", "483", "490", "502", "542" ] }, { "name": "TELNYX", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "301", "314", "916" ] }, { "name": "American Network", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "217", "915" ] }, { "name": "CSC Wireless LLC", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "819", "984" ] }, { "name": "AAT Paging Corporation", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "556" ] }, { "name": "Airus Inc", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "990" ] }, { "name": "American Messaging", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "453" ] }, { "name": "Astound Broadband", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "406" ] }, { "name": "Emergency Networks", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "989" ] }, { "name": "Fishers Island Telephone Corporation", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "788" ] }, { "name": "Fractel", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "966" ] }, { "name": "HD Carrier", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "568" ] }, { "name": "IP Horizon", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "409" ] }, { "name": "LTE Wireless", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "550" ] }, { "name": "Peering Hub Inc", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "717" ] }, { "name": "Scarsdale Security Systems", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "733" ] }, { "name": "Shelltel", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "280" ] }, { "name": "Wide Voice", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "931" ] }, { "name": "Yorkstream Communications", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "999" ] } ], "grid": "fvvvfffffffuvffmfffmmfffffffffvffffmfffffmfffmffvfffmffmffmfmffmffffvffffffmmfmmmfffffffffmmffmffffffvvmmmfmmfmuffvfmmffffmffffmffffmfmmmfmvmfffffvmfvffmvfmmfmvffuffmfffffmmmmmfmfmfmfmmfffffffffmffvmfvmfffffvmvfufmffmfffffffffmfmvvmmmffffvffmmffmffmmvfmmfmmffmfmfmvfffffffffffffffffffmffmffffffmmfvffvffffvfmmffumffvvfvvfffmmfvffvmffffvffmfvffffvffffmfmmmumvmmmffffmffvffvmffmffmmfffffffffffffffffffmvmfffmfffmfufvvffmffffffmvmffffvffffmfffmvffmmvfffffffffffffmfmfmffffffmmfffffffmmmfvvffffmffffmfmffuffmmvffmffuffffffmfmffffffffffffmfvffffmmmffmmmmfffffffffffffffmfmmffffffmfffffffffffmfffmffmffmfffvfffmmmmvmvuffvfmvfmfffffvfmfmfmfmmmmfmmffffffffmffffffmfffffffffffffffmmmfmfmffmfmffmfffmfffffvmmffvmmmffmffffuffmfv-fvfmmfffmffffffmmmfffmffmmfvmfmmufffvfffuufffffmvfffvfffmvuvffvfffmvvmmmffffmffmff", "patterns": { "all": "^\\+1631[2-9]\\d{6}$", "fixed_line": "^\\+1631(?:2(?:0[04-9]|1[0346-8]|[28][1-9]|3[1-46-9]|4[02-4679]|5[0134679]|6[124-79]|7[0-47]|9[235-9])|3(?:0[069]|1[23589]|2[013-689]|3[0137]|4[1-58]|5[0147]|6[01346-9]|7[068]|8[025-9]|9[0-3569])|4(?:0[2-6]|1[02457-9]|2[0-57]|3[4-79]|4[03467]|5[1478]|6[025-9]|7\\d|8[0-35689]|9[0-3689])|5(?:0[1-469]|1[0347]|2[0-2578]|[36][1-4679]|4[1-46-9]|51|7[03467]|8\\d|9[0-8])|6(?:0[2-46-8]|1[025689]|2[0-37-9]|3[02-57-9]|4[237-9]|5\\d|6[135-9]|7[03-9]|8[36-9]|9[1-4689])|7(?:0[12679]|1[02-79]|2[1-9]|3[0-246-9]|4[349]|5\\d|6[0-3589]|7[0-35-9]|8[0-57-9]|9[12457-9])|8(?:0[1-3]|1[2358]|2[0-468]|3[027]|4[0-79]|5[0-46-9]|6\\d|7[04689]|8[1346-8]|9[0-489])|9(?:0[457-9]|1[02358]|2[03-57-9]|3[0-26-8]|4[0147]|5[1-35-7]|6[0-47-9]|7[1-389]|8[1-3]|9[0-35689]))\\d{4}$", "mobile": "^\\+1631(?:2(?:1[59]|[28]0|35|4[15]|5[258]|6[03]|7[5689]|9[014])|3(?:0[3-578]|1[067]|2[27]|3[24-68]|4[07]|5[2568]|65|7[1-579]|8[134]|9[48])|4(?:0[18]|1[36]|2[68]|3[1-3]|4[12589]|5[23569]|6[13]|8[47]|9[45])|5(?:0[78]|12|2[34]|3[08]|5[02-4689]|6[05]|7[2589]|99)|6(?:0[159]|17|2[46]|36|4[045]|6[024]|7[12]|8[0-2]|9[057])|7(?:0[348]|18|20|33|4[0-25-8]|6[467]|74|86|9[036])|8(?:0[4-79]|1[69]|2[79]|3[13-689]|48|55|7[1-357]|8[0259]|9[67])|9(?:0[1-36]|[17]4|2[126]|3[3-59]|4[23689]|65|8[47-9]|9[47]))\\d{4}$", "voip": "^\\+1631(?:2(?:0[1-3]|12|30|[46]8)|3(?:0[12]|14|39|4[69]|5[39]|97)|4(?:0[079]|29|3[08]|50|64|97)|5(?:[04][05]|1[5689]|2[69]|35|57|68|71)|6(?:00|1[34]|25|31|4[16]|8[45])|7[03]5|8(?:0[08]|1[047]|[29]5)|9(?:00|1[69]|45|54|66|7[057]|8[056]))\\d{4}$" }, "sandbox": { "input": "+16315550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+16315550123", "international": "+1 631-555-0123", "national": "(631) 555-0123", "rfc3966": "tel:+1-631-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "631", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 631?", "answer": "Area code 631 is in New York, in the United States: all 799 of its exchanges on record are there. From abroad it is dialled +1 631, then the seven-digit number." }, { "question": "Is a 631 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 799 exchanges on record in 631, 195 (24%) were allocated as mobile, 520 (65%) as fixed line, 69 (9%) as VoIP and 15 (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 631?", "answer": "30 carriers hold exchanges in 631 on record; the most: Verizon (340), AT&T (87) and T-Mobile (85). 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 631 phone number?", "answer": "In E.164 a 631 number matches ^\\+1631[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 (631) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-212", "us-315", "us-329", "us-332", "us-347", "us-363", "us-516", "us-518", "us-585", "us-607", "us-646", "us-680", "us-716", "us-718", "us-838", "us-845", "us-914", "us-917", "us-929", "us-934" ], "previous": "us-630", "next": "us-636" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 799, "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" } ] } }