Get a 307 Wyoming number — Cheyenne, Casper, Jackson, Laramie or anywhere in the Cowboy State — on the phone you already own. Wyoming's single statewide prefix on one app. Pick a 307 your customers will recognise on caller ID.
Wyoming has 1 active area code — 307. You can get a virtual Wyoming phone number from any of these area codes through CallMama without a US address or SIM card.
Wyoming was assigned a single area code in 1947: 307, covering the entire state. For 78 years 307 has carried all of Wyoming — the least-populated US state (581K residents) yet the 10th-largest by land area.
Wyoming is one of only 11 US states that have never received an additional area code. With population density of just 6 people per square mile (lowest of any contiguous US state), 307 has comfortably served Wyoming without splits or overlays for nearly eight decades.
"307" has become Wyoming cultural shorthand — featured on local apparel, every Cowboys (Univ. of Wyoming) fan reference, every Yellowstone gateway business, every Jackson Hole resort and ranch operation. In a state where being a Wyomingite is a tight-knit identity, 307 is the universal credential.
Wyoming is the least-populated US state (581K residents) but ranks 10th in land area — making it one of the most sparsely populated places in the developed world (6 people per square mile). Its 307 area code is one of the most uniformly recognised prefixes in America: ask any Wyomingite anywhere and they'll know "307" instantly.
Every Wyoming area code plotted at its primary city. Click any marker for that code's details. Overlays share geography with their parent code — they're shown offset on the map for visibility.
Every Wyoming metro covered by a different prefix. Open any card to view its full detail page.
Find your city, find its area code, then activate a number with that prefix.
A local Wyoming prefix outperforms an out-of-state cell at every customer touchpoint.
The Cowboy State's only area code since 1947 — 307 is the unmistakable Wyoming credential. Every Wyomingite recognises it instantly. Ranchers, oil-patch workers, Jackson Hole resort operators, UW Cowboys fans all use 307.
Wyoming has no state income tax (one of nine US states without one) plus the most business-friendly LLC laws in the US. A 307 prefix signals you're in this distinctive financial environment.
Wyoming sits in Mountain Time aligned with Colorado, Utah, Montana. A WY prefix tells Mountain West clients you're on their schedule.
307 covers Cheyenne, Casper, Jackson, Laramie, Gillette, Rock Springs, Sheridan, Cody — every Wyoming town. One prefix tells every Wyomingite you're local.
NANPA-routed Wyoming numbers pass carrier authentication, so cold-call recipients see your local prefix instead of a flagged "Spam Likely" tag.
Cancel service and your Wyoming number is reserved free for 12 months — keep your 307 across ranching seasons and Yellowstone-visitor cycles.
Each Wyoming area code covers a distinct region. Here's how the population breaks down.
Source: US Census Bureau / ACS estimates.
Pick the digits, install the app, take the first call. That's the whole sequence.
CallMama generates 10–20 available numbers in any Wyoming area code. Vanity patterns supported.
Install CallMama on the device you already use. Sign in once — your Wyoming number is linked.
Inbound and outbound on the same device. Local Wyoming caller ID on every outgoing call.
Search by state, city, or number — then click any code to open its detail page. Wyoming is in here too.
| State | Area Codes | Time Zone | Count |
|---|---|---|---|
| Alabama | 205251256334659938 | CT | 6 |
| Alaska | 907 | AKT | 1 |
| Arizona | 480520602623928 | MST | 5 |
| Arkansas | 479501870 | CT | 3 |
| California | 213310408415510619650714818916 | PT | 10 |
| Colorado | 303719720970 | MT | 4 |
| Connecticut | 203475860959 | ET | 4 |
| Delaware | 302 | ET | 1 |
| District of Columbia | 202 | ET | 1 |
| Florida | 239305321407561727786813850904954 | ET* | 11 |
| Georgia | 229404470478678706762770912 | ET | 9 |
| Hawaii | 808 | HST | 1 |
| Idaho | 208986 | MT* | 2 |
| Illinois | 217224309312331618630708773779815847872 | CT | 13 |
| Indiana | 219260317463574765812930 | ET* | 8 |
| Iowa | 319515563641712 | CT | 5 |
| Kansas | 316620785913 | CT* | 4 |
| Kentucky | 270364502606859 | ET* | 5 |
| Louisiana | 225318337504985 | CT | 5 |
| Maine | 207 | ET | 1 |
| Maryland | 240301410443667 | ET | 5 |
| Massachusetts | 339351413508617774781857978 | ET | 9 |
| Michigan | 231248269313517586616734810906947989 | ET* | 12 |
| Minnesota | 218320507612651763952 | CT | 7 |
| Mississippi | 228601662769 | CT | 4 |
| Missouri | 314417573636660816 | CT | 6 |
| Montana | 406 | MT | 1 |
| Nebraska | 308402531 | CT* | 3 |
| Nevada | 702725775 | PT | 3 |
| New Hampshire | 603 | ET | 1 |
| New Jersey | 201551609732848856862908973 | ET | 9 |
| New Mexico | 505575 | MT | 2 |
| New York | 212315332347516518585607631646680716718838845914917929934 | ET | 19 |
| North Carolina | 252336704743828910919980984 | ET | 9 |
| North Dakota | 701 | CT* | 1 |
| Ohio | 216234330380419440513567614740937 | ET | 11 |
| Oklahoma | 405539580918 | CT | 4 |
| Oregon | 458503541971 | PT* | 4 |
| Pennsylvania | 215267272412445484570610717724814878 | ET | 12 |
| Rhode Island | 401 | ET | 1 |
| South Carolina | 803843854864 | ET | 4 |
| South Dakota | 605 | CT* | 1 |
| Tennessee | 423615629731865901931 | CT* | 7 |
| Texas | 210214254281325346361409430432469512682713737806817830832903 | CT* | 20 |
| Utah | 385435801 | MT | 3 |
| Vermont | 802 | ET | 1 |
| Virginia | 276434540571703757804 | ET | 7 |
| Washington | 206253360425509564 | PT | 6 |
| West Virginia | 304681 | ET | 2 |
| Wisconsin | 262414534608715920 | CT | 6 |
| Wyoming | 307 | MT | 1 |
| Puerto Rico | 787939 | AST | 2 |
One tap to install. One more to call. It really is that simple.
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