{ "url": "https://phonelookup.dev/prefix/us-660", "npa": "660", "slug": "us-660", "iso": "US", "country": "United States", "regions": [ { "code": "MO", "name": "Missouri", "exchanges": 531 } ], "exchanges": 531, "known": 516, "byLineType": { "fixed_line": 336, "mobile": 105, "unknown": 15, "voip": 75 }, "carriers": [ { "name": "Lumen", "exchanges": 130, "byLineType": { "fixed_line": 129, "voip": 1 }, "ranges": [ "200", "204–210", "212", "218–220", "223", "225", "228", "230–231", "240", "242–243", "246", "250–252", "259", "262", "274", "279", "282–283", "285", "288–289", "294", "298", "301–302", "312", "319", "327", "332–333", "335", "343", "366", "383", "385–386", "398", "422", "428–429", "431", "433", "438", "442", "462–463", "472", "474", "476–478", "493", "498", "515", "527", "535", "538", "543–544", "547–548", "552", "560", "562", "568", "582", "594–595", "598", "616", "634", "638", "645", "647", "653", "655–656", "668–669", "671–672", "675", "677–679", "683", "686", "691", "693–694", "696", "699", "722", "727", "736", "747", "754", "774", "778", "797", "825", "833", "839", "841", "847", "849", "885", "889–890", "906", "927", "948", "952", "956", "972", "977–978", "992" ] }, { "name": "AT&T", "exchanges": 78, "byLineType": { "fixed_line": 43, "mobile": 34, "voip": 1 }, "ranges": [ "202", "214–215", "217", "235–236", "247–248", "258", "263", "268–269", "273", "281", "287", "293", "310", "324", "329", "331", "334", "338–340", "347", "351", "357–359", "365", "372", "376", "379", "387", "397", "404", "424", "441", "456–457", "483", "529–530", "537", "541–542", "553", "563", "572", "586", "623", "626–627", "635", "646", "665", "687", "707", "723", "730", "734", "752", "783", "785", "787", "815", "822", "826–827", "829", "831", "848", "865", "868", "882", "886", "888", "998" ] }, { "name": "Onvoy", "exchanges": 41, "byLineType": { "voip": 41 }, "ranges": [ "249", "260", "275", "290", "296", "303", "336", "360", "363", "371", "409", "454–455", "466", "587", "613", "628", "650", "660–662", "667", "680", "688", "697", "717", "720–721", "741", "761", "767", "776", "781", "808", "816", "835", "862", "910", "964", "975", "987" ] }, { "name": "Grand River Mutual Telephone Corporation", "exchanges": 36, "byLineType": { "fixed_line": 36 }, "ranges": [ "244", "286", "326", "382", "425–426", "439", "448", "485", "592", "639", "652", "666", "673", "684", "735", "748", "789", "793–794", "799", "824", "845", "867", "872", "875–876", "878", "893", "895", "937–939", "944", "946", "986" ] }, { "name": "Verizon", "exchanges": 32, "byLineType": { "mobile": 32 }, "ranges": [ "224", "253–254", "280", "292", "299", "308", "322", "373", "375", "412–415", "464", "491–492", "605", "619–621", "624", "631", "641", "654", "728", "788", "920", "953", "971", "973", "988" ] }, { "name": "T-Mobile", "exchanges": 27, "byLineType": { "mobile": 27 }, "ranges": [ "221", "227", "229", "232–233", "238", "270", "276", "306", "317", "349", "353", "460", "473", "525", "528", "539", "556", "580", "591", "596", "853", "864", "869", "898", "909", "924" ] }, { "name": "Windstream", "exchanges": 26, "byLineType": { "fixed_line": 26 }, "ranges": [ "256", "265–266", "272", "291", "297", "348", "367–368", "399", "445", "470", "533", "559", "564", "581", "663", "726", "749", "786", "828", "856", "858", "877", "954", "963" ] }, { "name": "Chariton Valley Telephone", "exchanges": 18, "byLineType": { "fixed_line": 18 }, "ranges": [ "222", "226", "239", "261", "277", "295", "388", "481", "486", "534", "549", "565", "689", "695", "768", "773", "775", "777" ] }, { "name": "Fractel", "exchanges": 16, "byLineType": { "voip": 16 }, "ranges": [ "300", "356", "400", "444", "500", "566", "599", "600", "633", "724", "732", "758", "800", "842", "855", "900" ] }, { "name": "Northeast Missouri Rural Telephone Company", "exchanges": 14, "byLineType": { "fixed_line": 14 }, "ranges": [ "328", "344", "355", "465", "488", "692", "766", "857", "866", "874", "883", "933", "945", "947" ] }, { "name": "Green Hills Telephone Corporation", "exchanges": 13, "byLineType": { "fixed_line": 13 }, "ranges": [ "255", "352", "354", "484", "622", "636", "644", "659", "731", "738", "745", "755", "772" ] }, { "name": "Mark Twain Rural Telephone Company", "exchanges": 12, "byLineType": { "fixed_line": 12 }, "ranges": [ "213", "278", "284", "323", "423", "434", "479", "733", "739", "762", "892", "949" ] }, { "name": "Otelco", "exchanges": 12, "byLineType": { "fixed_line": 12 }, "ranges": [ "337", "427", "458", "489", "784", "834", "837–838", "846", "852", "859", "879" ] }, { "name": "UScellular", "exchanges": 8, "byLineType": { "mobile": 8 }, "ranges": [ "216", "341–342", "346", "384", "651", "670", "676" ] }, { "name": "Bandwidth.com", "exchanges": 6, "byLineType": { "voip": 6 }, "ranges": [ "264", "951", "955", "960–961", "974" ] }, { "name": "Craw-Kan Telephone Cooperative", "exchanges": 5, "byLineType": { "fixed_line": 5 }, "ranges": [ "267", "447", "643", "832", "925" ] }, { "name": "IAMO Telephone Company", "exchanges": 4, "byLineType": { "fixed_line": 4 }, "ranges": [ "725", "729", "742", "984" ] }, { "name": "Frontier", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "237", "394", "584" ] }, { "name": "Green Hills Telecommunications Services", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "203", "345", "593" ] }, { "name": "Peerless Network", "exchanges": 3, "byLineType": { "voip": 3 }, "ranges": [ "402", "522", "690" ] }, { "name": "Rock Port Telephone Company", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "389", "744", "993" ] }, { "name": "Spectrum", "exchanges": 3, "byLineType": { "fixed_line": 3 }, "ranges": [ "201", "362", "851" ] }, { "name": "Chariton Valley Telecom", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "234", "395" ] }, { "name": "Eon Telecom", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "257", "271" ] }, { "name": "Holway Telephone Company", "exchanges": 2, "byLineType": { "fixed_line": 2 }, "ranges": [ "928", "935" ] }, { "name": "NETGENUITY INC.", "exchanges": 2, "byLineType": { "mobile": 2 }, "ranges": [ "557", "570" ] }, { "name": "Terra Nova Telecom", "exchanges": 2, "byLineType": { "voip": 2 }, "ranges": [ "378", "994" ] }, { "name": "Alma Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "674" ] }, { "name": "COMMIO LLC", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "770" ] }, { "name": "CSC Wireless LLC", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "494" ] }, { "name": "Consolidated Communications", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "499" ] }, { "name": "Emergency Networks", "exchanges": 1, "byLineType": { "mobile": 1 }, "ranges": [ "245" ] }, { "name": "IP Horizon", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "863" ] }, { "name": "MCC Telephony", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "440" ] }, { "name": "Midwest Data Center", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "771" ] }, { "name": "Optimum", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "241" ] }, { "name": "Oregon Farmers Mutual Telephone Company", "exchanges": 1, "byLineType": { "fixed_line": 1 }, "ranges": [ "446" ] }, { "name": "Skyetel", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "330" ] }, { "name": "TELNYX", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "999" ] }, { "name": "Ton80 Communications", "exchanges": 1, "byLineType": { "voip": 1 }, "ranges": [ "588" ] } ], "grid": "ffmffffffffuffmmmmfffmffmffmfmffmmfmffmffffffmfmfvfffmmfffffvfffvfffffmffffvmfffmmfffffmffvfmfffvffmvffv--m-m-fuv----m-f--mfv-fffmvmffmfvfffmmmfffmffm-mfmffvfffv-fv-mfff--vfm-mf-vf--ffmffmff----ff-fffv-v-m----v-ummmm------ffmfffff-f-ff---fffmf-vffff-----vvfff-m-ffmfv---f-fmf-ffff-f-mfff-ff-mmfm---ffv----------u---f------v--m-fmff--fff-mfm-mfff--fff--fm-umm-ff-ffffv-f-m-m-------mff-f-fvv--mffffm-fvv----m-----u-v--f--mmmfmm-ffv--m-vfmf-ff-m-fffff--vmffmff--fvvvf-ffvffmfffffmfffv--ff-ffvfvffffffv-fu------f---u-----v--vvfmvfffmfffvfmff-ff-vf-ff-fff--f-ff--v--vf---fvf-vfffffvff--v-ffffmmf---ff--f-fv-------v--u---mv-----m-ffffff-ffffv-fff-fv--fffff-ffm-vffff--vvmmffmm--f-ffffff--ff-ff-mff-ff-f--m-v-----f--mvu--------m---mf-ff----f-f-fff----ffffffuvfmfvf-uuvv-fv---u--mfmvvuff-----f-fvm---ffv---mv", "patterns": { "all": "^\\+1660[2-9]\\d{6}$", "fixed_line": "^\\+1660(?:2(?:0[013-9]|1[02389]|2[023568]|3[014679]|4[0-468]|5[0-25-9]|6[1-35-9]|7[1-47-9]|8[2-689]|9[13-578])|3(?:0[12]|1[09]|2[36-8]|3[2357-9]|4[3-578]|5[2457-9]|6[26-8]|7[269]|8[235689]|9[457-9])|4(?:2[235-9]|3[13489]|4[025-8]|5[6-8]|6[235]|7[0246-9]|8[14-689]|9[389])|5(?:15|2[79]|3[03-58]|4[2-47-9]|5[29]|6[02-58]|8[1246]|9[2-58])|6(?:16|2[267]|3[4689]|4[3-7]|5[23569]|6[35689]|7[1-57-9]|8[34679]|9[1-69])|7(?:07|2[25-79]|3[0135689]|4[2457-9]|5[245]|6[268]|7[1-578]|8[3-69]|9[3479])|8(?:2[4-9]|3[1-47-9]|4[15-9]|5[126-9]|6[67]|7[24-9]|8[23569]|9[0235])|9(?:06|2[578]|3[357-9]|4[4-9]|5[246]|63|7[278]|8[46]|9[23]))\\d{4}$", "mobile": "^\\+1660(?:2(?:02|1[4-7]|2[1479]|3[2358]|4[57]|5[34]|7[06]|8[017]|9[29])|3(?:0[68]|17|2[29]|3[14]|4[0-269]|5[13]|65|7[35]|8[47])|4(?:[02]4|1[2-5]|41|6[04]|[78]3|9[124])|5(?:2[58]|3[79]|41|5[367]|7[02]|80|9[16])|6(?:05|19|2[0134]|3[15]|41|5[14]|7[06])|7(?:2[38]|34|8[78])|8(?:15|22|53|6[4589]|[89]8)|9(?:09|2[04]|53|7[13]|[89]8))\\d{4}$", "voip": "^\\+1660(?:2(?:49|6[04]|75|9[06])|3(?:[06][03]|12|24|3[06]|56|7[18])|4(?:0[029]|44|5[45]|66)|5(?:00|22|66|8[78]|99)|6(?:[05]0|[13]3|28|6[0-27]|8[08]|9[07])|7(?:17|2[014]|32|[48]1|58|6[17]|7[06])|8(?:0[08]|16|[35]5|42|6[23])|9(?:[01]0|5[15]|6[014]|7[45]|87|9[49]))\\d{4}$" }, "sandbox": { "input": "+16605550123", "valid": true, "type": "Fixed line or mobile", "region": "US", "formats": { "e164": "+16605550123", "international": "+1 660-555-0123", "national": "(660) 555-0123", "rfc3966": "tel:+1-660-555-0123" }, "parts": { "countryCode": "+1", "destinationCode": "660", "destinationKind": "area code", "subscriber": "5550123" } }, "faq": [ { "question": "Where is area code 660?", "answer": "Area code 660 is in Missouri, in the United States: all 531 of its exchanges on record are there. From abroad it is dialled +1 660, then the seven-digit number." }, { "question": "Is a 660 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 531 exchanges on record in 660, 105 (20%) were allocated as mobile, 336 (63%) as fixed line, 75 (14%) as VoIP and 15 (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 660?", "answer": "40 carriers hold exchanges in 660 on record; the most: Lumen (130), AT&T (78) and Onvoy (41). 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 660 phone number?", "answer": "In E.164 a 660 number matches ^\\+1660[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 (660) 555-0123. The exchange patterns on this page narrow it to the exchanges allocated as mobile, fixed line or VoIP." } ], "neighbours": { "sameRegion": [ "us-235", "us-314", "us-417", "us-557", "us-573", "us-636", "us-816", "us-975" ], "previous": "us-659", "next": "us-661" }, "meta": { "dataAsOf": "2026-10-25", "dataPoints": 531, "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" } ] } }