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National Destination Code:312
This is the United States National Destination Code:312 Area Code Database page list. You can click the title to browse the detail information.
Region Code: IL
Region Name
City
Sn from
Sn to
Carrier Name
Number Type
Illinois
Chicago
2240000
2249999
BROADWING COMM - IL
G
Illinois
Chicago
2250000
2259999
AMERITECH ILLINOIS
G
Illinois
Chicago
2260000
2269999
AMERITECH ILLINOIS
G
Illinois
Chicago
2270000
2270999
AMERITECH ILLINOIS
G
Illinois
Chicago
2271000
2271999
AMERITECH ILLINOIS
G
Illinois
Chicago
2272000
2272999
AMERITECH ILLINOIS
G
Illinois
Chicago
2273000
2273999
AMERITECH ILLINOIS
G
Illinois
Chicago
2274000
2274999
AMERITECH ILLINOIS
G
Illinois
Chicago
2275000
2275999
AMERITECH ILLINOIS
G
Illinois
Chicago
2276000
2276999
AMERITECH ILLINOIS
G
Illinois
Chicago
2277000
2277999
AMERITECH ILLINOIS
G
Illinois
Chicago
2278000
2278999
AMERITECH ILLINOIS
G
Illinois
Chicago
2279000
2279999
AMERITECH ILLINOIS
G
Illinois
Chicago
2280000
2289999
AMERITECH ILLINOIS
G
Illinois
Chicago
2290000
2290999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2291000
2291999
OVATION COMM - IL
G
Illinois
Chicago
2292000
2292999
AMERITECH ILLINOIS
G
Illinois
Chicago
2293000
2293999
AMERITECH ILLINOIS
G
Illinois
Chicago
2294000
2294999
OVATION COMM - IL
G
Illinois
Chicago
2295000
2295999
OVATION COMM - IL
G
Illinois
Chicago
2296000
2296999
OVATION COMM - IL
G
Illinois
Chicago
2297000
2297999
OVATION COMM - IL
G
Illinois
Chicago
2298000
2298999
AMERITECH ILLINOIS
G
Illinois
Chicago
2299000
2299999
PAETEC COMM - IL
G
Illinois
Chicago
2300000
2300999
AMERITECH ILLINOIS
G
Illinois
Chicago
2301000
2301999
AMERITECH ILLINOIS
G
Illinois
Chicago
2302000
2302999
AMERITECH ILLINOIS
G
Illinois
Chicago
2303000
2303999
AMERITECH ILLINOIS
G
Illinois
Chicago
2304000
2304999
AMERITECH ILLINOIS
G
Illinois
Chicago
2305000
2305999
AMERITECH ILLINOIS
G
Illinois
Chicago
2306000
2306999
AMERITECH ILLINOIS
G
Illinois
Chicago
2307000
2307999
AMERITECH ILLINOIS
G
Illinois
Chicago
2308000
2308999
METRO PCS INC.
M
Illinois
Chicago
2309000
2309999
AMERITECH ILLINOIS
G
Illinois
Chicago
2320000
2329999
AMERICAN MESSAGING
M
Illinois
Chicago
2330000
2330999
AMERITECH ILLINOIS
G
Illinois
Chicago
2331000
2331999
AMERITECH ILLINOIS
G
Illinois
Chicago
2332000
2332999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2333000
2333999
AMERITECH ILLINOIS
G
Illinois
Chicago
2334000
2334999
AMERITECH ILLINOIS
G
Illinois
Chicago
2335000
2335999
AMERITECH ILLINOIS
G
Illinois
Chicago
2336000
2336999
AMERITECH ILLINOIS
G
Illinois
Chicago
2337000
2337999
AMERITECH ILLINOIS
G
Illinois
Chicago
2338000
2338999
AMERITECH ILLINOIS
G
Illinois
Chicago
2339000
2339999
AMERITECH ILLINOIS
G
Illinois
Chicago
2340000
2340999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2341000
2341999
AMERITECH ILLINOIS
G
Illinois
Chicago
2342000
2342999
AMERITECH ILLINOIS
G
Illinois
Chicago
2343000
2343999
AMERITECH ILLINOIS
G
Illinois
Chicago
2344000
2344999
AMERITECH ILLINOIS
G
Illinois
Chicago
2345000
2345999
AMERITECH ILLINOIS
G
Illinois
Chicago
2346000
2346999
AMERITECH ILLINOIS
G
Illinois
Chicago
2347000
2347999
AMERITECH ILLINOIS
G
Illinois
Chicago
2348000
2348999
AMERITECH ILLINOIS
G
Illinois
Chicago
2349000
2349999
AMERITECH ILLINOIS
G
Illinois
Chicago
2350000
2350999
AMERITECH ILLINOIS
G
Illinois
Chicago
2351000
2351999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2352000
2352999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2353000
2353999
PAETEC COMM - IL
G
Illinois
Chicago
2354000
2354999
FIRST COMM LLC - IL
G
Illinois
Chicago
2355000
2355999
FIRST COMM LLC - IL
G
Illinois
Chicago
2356000
2356999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2357000
2357999
AMERITECH ILLINOIS
G
Illinois
Chicago
2358000
2358999
AMERITECH ILLINOIS
G
Illinois
Chicago
2359000
2359999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2360000
2369999
AMERITECH ILLINOIS
G
Illinois
Chicago
2370000
2370999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2371000
2371999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2372000
2372999
BROADWING COMM - IL
G
Illinois
Chicago
2373000
2373999
PAETEC COMM - IL
G
Illinois
Chicago
2374000
2374999
FIRST COMMUNICATIONS
G
Illinois
Chicago
2375000
2375999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2376000
2376999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2377000
2377999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2378000
2378999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2379000
2379999
VERIZON WIRELESS-IL
M
Illinois
Chicago
2380000
2380999
BROADWING COMM - IL
G
Illinois
Chicago
2381000
2381999
BROADWING COMM - IL
G
Illinois
Chicago
2382000
2382999
BROADWING COMM - IL
G
Illinois
Chicago
2383000
2383999
BROADWING COMM - IL
G
Illinois
Chicago
2384000
2384999
BROADWING COMM - IL
G
Illinois
Chicago
2385000
2385999
BROADWING COMM - IL
G
Illinois
Chicago
2386000
2386999
BROADWING COMM - IL
G
Illinois
Chicago
2387000
2387999
BROADWING COMM - IL
G
Illinois
Chicago
2388000
2388999
BROADWING COMM - IL
G
Illinois
Chicago
2389000
2389999
BROADWING COMM - IL
G
Illinois
Chicago
2390000
2390999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2391000
2391999
OVATION COMM - IL
G
Illinois
Chicago
2392000
2392999
FIRST COMM LLC - IL
G
Illinois
Chicago
2393000
2393999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2394000
2394999
AT&T LOC - NY
G
Illinois
Chicago
2395000
2395999
AT&T LOC - NY
G
Illinois
Chicago
2396000
2396999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2397000
2397999
XO ILLINOIS INC.
G
Illinois
Chicago
2398000
2398999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2399000
2399999
AT&T LOC - NY
G
Illinois
Chicago
2400000
2409999
AMERITECH ILLINOIS
G
Illinois
Chicago
2410000
2410999
T-MOBILE USA INC.
M
Illinois
Chicago
2411000
2411999
LEVEL 3 COMM - IL
G
Illinois
Chicago
2412000
2412999
NEW CINGULAR WRLS IL
M
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