Rate Centre Lookup

21,763 rate centres across the United States and Canada. A rate centre is the telephone exchange area a number is homed to — the thing that decides which area codes can serve an address, and whether a call between two points is local.

7001–7050 of 21,763
Rate centreRegionArea codesIncumbentLATALIRBlocksSwitches
FrontierMI517FRONTIER COMMUNICATIONS OF MICHIGAN, INC. (4417)346—8FRONTIER, LNNGMIMN00Z, LNNGMIMN17Z +2
FrontierSK306, 639SASKTEL (8091)8888091073FRNTSK010MD, FRONTIER
FrostMN507CANNON VALLEY TELECOM, INC. (1440)620—10BLUE EARTH
FrostTX430, 903VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW (1163)552—15DLLSTX97X6X, DLLSTXLD8MD, FROST +1
FrostburgMD240, 301VERIZON MARYLAND, INC. (9212)240—58CMLDMDCH0MD, CMLDMDCM2MD, CMLDMDCMEMD +10
FrostproofFL863FRONTIER FLORIDA LLC DBA FRONTIER COMM OF FLORIDA (0328)952—67FROSTPROOF, TAMPA, TAMPFLDEXMD +11
FruitaCO970QWEST CORPORATION (9636)656—48DENVER, DNVRCO2669Z, DNVRCO26XIX +10
FruitdaleAL251MILLRY TEL. CO. (0304)480—1MILLRY
FruithurstAL256, 938BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL (9417)438—40ATLANTA, ATLNGABU05Z, ATLNGABUXZY +5
FruitlandID208, 986FARMERS MUTUAL TEL. CO. (2221)652—15BOISIDMAX2X, FRUITLAND
FruitlandUT435UBTA-UBET COMMUNICATIONS, INC. DBA STRATA NETWORKS (2287)660—1VERNAL
FruitportMI231FRONTIER NORTH, INC. - MI (0695)348—30ANTSMIAD0MD, BRSPMI096MD, FRUITPORT +8
FruitvaleBC250, 778TELUS COMMUNICATIONS, INC. - BC (8086)8888086142FRUITVALE, FRVABC020MD
FryeburgME207CONSOLIDATED COMMUNICATIONS OF MAINE COMPANY (3316)120—22FRYEBURG, PORTLAND, PTLDMECMAMD +3
FrystownPA223, 717VERIZON NORTH, INC. - PA (0169)226—37CRLSPAXCX2X, FRYSTOWN, HARRISBURG +10
FugèrevilleQC819TELEBEC LIMITED (8239)8888239131FUGEREVILLE
FuldaMN507CENTURYTEL OF MINNESOTA, INC. DBA CENTURYLINK (1445)620—20FULDA, OWTNMNOWTMD, OWTNMNOWYMD +6
Fulford HarbourBC236, 250, 672, 778TELUS COMMUNICATIONS, INC. - BC (8086)8888086027FULFORD HARBOUR, SSISBC011MD, VCTABC01DMD +2
Fuller SpringsTX936CONSOLIDATED COMMUNICATIONS OF TEXAS COMPANY (2109)560—13FULLER SPRINGS, HSTNTX08X1X, HSTNTXMOX6X +3
FullertonCA657, 714PACIFIC BELL (9740)730—553ANAHEIM, ANHMCA01XEY, ANHMCA01XRY +25
FullertonND701DICKEY RURAL TEL. COOP. (1611)636—1ELLENDALE
FullertonNE308QWEST CORPORATION (9631)646—26FULLERTON, GDISNEASGMD, GDISNENW6MD +7
FultonAR870SOUTHWEST ARKANSAS TEL. COOP., INC. (1724)528—3FULTON, LTRKARWTBMD
FultonIL779, 815CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (1183)364—18DIXNILXA0MD, DIXNILXAEMD, DKLBILRS0MD +3
FultonIN574FRONTIER NORTH, INC.. - IN (0772)336—18FULTON, INDIANAPOLIS, IPLSIN01XDZ +2
FultonKS620CRAW-KAN TEL. COOP.,INC. - KS (1818)532—1GIRARD
FultonKY270BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (9419)464—40BWLGKYMAPMD, FULTON, MDVIKYMAX4Y +9
FultonMI269MICHIGAN BELL TEL CO (9323)348—29BERRIEN SPRINGS, BRSPMI091MD, FULTON +9
FultonMO573SOUTHWESTERN BELL (9533)520—115FULTON, MNCHMOAQGT1, NWTPMOABGT1 +13
FultonMS662FULTON TEL. CO., INC. (0455)482—6FULTON, JCSNMSCP59Z, JCSNMSCP67Z +2
FultonNY315, 680WINDSTREAM NEW YORK, INC. - FULTON (0106)136—93ESYRNYAW0MD, FULTON, SYRCNY02AMD +10
FultonhamOH220, 740OHIO BELL TEL CO (9321)324—26CLMBOH1125Z, CLMBOH1143Z, CLMBOH11XJZ +10
FunkNE308GLENWOOD TEL. MEMBERSHIP CORP. (1553)646—1FUNK
FunstonGA229WINDSTREAM GEORGIA COMMUNICATIONS CORP. (4332)444—25ALBYGAMAXJX, ALBYGAMAXOX, FTZGGAXAKMD +3
Fuquay-VarinaNC919, 984BRIGHTSPEED OF EASTERN NORTH CAROLINA, LLC (0470)426—101DRHMNCEV0MD, DURHAM, FUQUAY VARINA +13
FyffeAL256FARMERS TELECOMMUNICATIONS COOPERATIVE, INC. (0290)476—29BRHMAL41AMD, BRHMALXSGT2, BRHNALWN1MD +1
GabarusPE782, 902—888—2GABARUS, SYDNNS01EMD
GabbsNV775NEVADA BELL (9742)720—24GABBS, RENO, RENONV029MD +8
Gabriola IslandBC236, 250, 672TELUS COMMUNICATIONS, INC. - BC (8086)8888086154GABRIOLA ISLAND, GBRLBCAA0MD, NNIMBC01EMD +1
GackleND701DAKOTA CENTRAL TELECOM I, INC. (1683)636—1CGTNNDXA2MD
GadsbyAB403, 825TELUS COMMUNICATIONS, INC. (8084)8888084122GADSBY, RDDRAB016MD
GadsdenAL256, 938BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL (9419)476—281BIRMINGHAM, BRHMAL16X3Y, BRHMAL16X8X +26
GaffneySC821, 864BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL (9417)430—129GAFFNEY, GNVLSCDBX3X, GNVLSCDT02Z +18
GageKY270BALLARD RURAL TEL. COOP. CORP., INC. (0396)464—2LA CENTER
GageOK580PIONEER TEL. COOP., INC. (2018)536—1GAGE
GagetownMI989MICHIGAN BELL TEL CO (9323)344—21GAGETOWN, SAGINAW, SGNWMIAC6MD +7
GagetownNB506NEW BRUNSWICK TELEPHONE, LTD. (8090)8888090062FCTNNBSCDMD, FREDERICTON
GahannaOH380, 614OHIO BELL TEL CO (9321)324—444CLMBOH1116Z, CLMBOH1125Z, CLMBOH1143Z +20
GailTX806POKA-LAMBRO TEL. COOP., INC. (2131)544—1GAIL
GainesMI989FRONTIER NORTH, INC. - MI (0695)340—22DTRTMIBLX4Y, DTRTMIVWDMD, FETPMIAU3MD +4

Searching for a place, not a rate centre?

Many places are localities inside a larger rate centre and hold no numbers of their own, so they are not listed above — Clinton, Maryland is part of Washington Zone 16. The Area Codes tab resolves a place name through to whichever rate centre actually serves it.

What These Terms Mean

The fields shown on the area code, rate centre and LATA pages, in plain language.

Rate centre — The exchange area a number belongs to
The telephone exchange area a block of numbers is homed to, and what decides whether a call between two points is local. It is not a city: many places are localities inside a larger rate centre and have no numbers of their own. Clinton, Maryland is part of the Washington Zone 16 rate centre, so its numbers are 227, 240 and 301.
NPA-NXX — Area code and prefix
The first six digits of a North American number. NPA is the three-digit area code, NXX the three-digit prefix — so 416-200 is NPA 416, NXX 200. Knowing the NPA-NXX identifies the exchange a number was issued from.
Thousands-block — A prefix split into ten pieces
A prefix holds 10,000 numbers, which is more than most carriers need, so prefixes are pooled: split into ten blocks of a thousand and handed to different carriers. The block digit is the fourth digit of the number, and A means the whole prefix went to one carrier. This is why 512 has 783 prefixes but 6,011 rows — 512-555-1xxx and 512-555-2xxx can belong to different companies.
OCN — The carrier holding the block
Operating Company Number — a four-character code identifying the carrier of record for a block. Two carriers can share a brand name and still have different OCNs, which is why the tables show the number alongside the name.
ILEC — The incumbent operator for the area
Incumbent Local Exchange Carrier — the established local operator for a rate centre, usually the former Bell company. It differs from the OCN whenever a block belongs to a competitor: a Toronto block can be held by Bell Cellular while the incumbent for the rate centre is Bell Ontario.
LATA — Where a call stops being local
Local Access and Transport Area — the region a call is routed within before it becomes long-haul. The boundaries date from the 1984 Bell System breakup and still shape how calls are routed and rated. A LATA is three digits, though some rate centres are published with a two-digit sub-code appended, shown here as 460.17. Browse every LATA.
LIR — The Canadian equivalent, roughly
Local Interconnection Region — how Canadian carriers divide territory for exchanging traffic. It only applies in Canada, so this field is blank on every US record by definition rather than by omission.
Switch / CLLI — The equipment serving the block
The telephone switch a block is routed through, named by its CLLI code — an eleven-character identifier where the first characters encode the place, as in TOROON01DS0 for Toronto. A switch typed POI is a point of interconnection, where carriers hand traffic to each other rather than serve subscribers directly.
Overlay and split — The two ways to add an area code
A split divides a region and gives part of it a new code, so existing numbers change. An overlay adds a code on top of the same territory, so nobody has to change a number — but everyone has to dial ten digits, since two numbers in the same place can now differ only by area code. 786 overlaid 305 in 1998; 941 split from 813 in 1995.

One limitation worth knowing. All of this describes the block a number was issued from. Number portability means a number can be carried to another carrier while keeping its digits, so the carrier shown is the carrier of record for the block, not necessarily whoever serves that specific line today. Nothing in this data can tell you which — only a live portability lookup can.