Area Code | Region | UTC Offset | DST Observed | Description |
|---|
| 52 | MX | -6 | | Mexico: Mexico City area (country code + city code) |
| 55 | MX | -6 | | Mexico: Mexico City area (country code + city code) |
| 201 | NJ | -5 | | N New Jersey: Jersey City, Hackensack (see split 973, overlay 551) |
| 202 | DC | -5 | | Washington, D.C. |
| 203 | CT | -5 | | Connecticut: Fairfield County and New Haven County; Bridgeport, New Haven (see 860) |
| 204 | MB | -6 | | Canada: Manitoba |
| 205 | AL | -6 | | Central Alabama (including Birmingham; excludes the southeastern corner of Alabama and the deep south; see splits 256 and 334) |
| 206 | WA | -8 | | W Washington state: Seattle and Bainbridge Island (see splits 253, 360, 425; overlay 564) |
| 207 | ME | -5 | | Maine |
| 208 | ID | -8 | | Idaho (can also be -7) |
| 209 | CA | -8 | | Cent. California: Stockton (see split 559) |
| 210 | TX | -6 | | S Texas: San Antonio (see also splits 830, 956) |
| 211 | -- | | | Local community info / referral services |
| 212 | NY | -5 | | New York City, New York (Manhattan; see 646, 718) |
| 213 | CA | -8 | | S California: Los Angeles (see 310, 323, 626, 818) |
| 214 | TX | -6 | | Texas: Dallas Metro (overlays 469/972) |
| 215 | PA | -5 | | SE Pennsylvania: Philadelphia (see overlays 267) |
| 216 | OH | -5 | | Cleveland (see splits 330, 440) |
| 217 | IL | -6 | | Cent. Illinois: Springfield |
| 218 | MN | -6 | | N Minnesota: Duluth |
| 219 | IN | -6 | | NW Indiana: Gary (see split 574, 260) Also -5 timez0ne |
| 224 | IL | -6 | | Northern NE Illinois: Evanston, Waukegan, Northbrook (overlay on 847, eff 1/5/2002) |
| 225 | LA | -6 | | Louisiana: Baton Rouge, New Roads, Donaldsonville, Albany, Gonzales, Greensburg, Plaquemine, Vacherie (split from 504) |
| 228 | MS | -6 | | S Mississippi (coastal areas, Biloxi, Gulfport; split from 601) |
| 229 | GA | -5 | | SW Georgia: Albany (split from 912; see also 478; perm 8/1/00) |
| 231 | MI | -5 | | W Michigan: Northwestern portion of lower Peninsula; Traverse City, Muskegon, Cheboygan, Alanson |
| 234 | OH | -5 | | NE Ohio: Canton, Akron (overlaid on 330; perm 10/30/00) |
| 236 | VA | -5 | | Virginia (region unknown) / Unassigned? |
| 239 | FL | -5 | | Florida (Lee, Collier, and Monroe Counties, excl the Keys; see 305; eff 3/11/02; mand 3/11/03) |
| 240 | MD | -5 | | W Maryland: Silver Spring, Frederick, Gaithersburg (overlay, see 301) |
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