Look up US area codes, ZIP codes, and international dialing codes — with the overlay history, timezone quirks, and local context a phone number alone won't tell you.https://dialwick.com/https://dialwick.com/how-to-call-japan-from-us/https://dialwick.com/how-to-call-japan-from-us/Dial 011, then 81, then drop the leading 0. Japan's area codes shrink as cities grow, and a fourth mobile prefix, 060, was due this year before carriers postponed the rollout.Thu, 03 Sep 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/north-carolina-area-codes/https://dialwick.com/north-carolina-area-codes/North Carolina has 10 area codes today, all descended from the single code assigned to the whole state in 1947, and regulators are now weighing an overlay for the one region still running on just one.Wed, 02 Sep 2026 00:00:00 GMTArea Code Listshttps://dialwick.com/how-to-call-france-from-us/https://dialwick.com/how-to-call-france-from-us/Dial 011, then 33, then drop the leading 0. France's five regional zones trace to a 1996 overnight switch, and its 09 prefix exists because of a 2005 fix for VoIP boxes like Freebox.Mon, 31 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/how-to-call-uk-from-us/https://dialwick.com/how-to-call-uk-from-us/Dial 011, then 44, then drop the leading 0. London's real area code is 020, not "0207" or "0208"; a study found only 13% of people could name it correctly.Sun, 30 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/country-code-92-pakistan/https://dialwick.com/country-code-92-pakistan/City codes run two to five digits; mobile numbers all start 03, a leftover of a 2008 digit migration. India's telecom regulator has also issued a specific advisory about calls from this code.Fri, 28 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/new-jersey-area-codes/https://dialwick.com/new-jersey-area-codes/New Jersey has 10 area codes today, all descended from a single statewide code assigned in 1947, including three overlays the state's utility board activated on the exact same day in 2001.Thu, 27 Aug 2026 00:00:00 GMTArea Code Listshttps://dialwick.com/how-to-call-india-from-us/https://dialwick.com/how-to-call-india-from-us/Dial 011, then 91, then the area code with its leading 0 dropped. India's STD system dates to 1960, and a 2025 regulator proposal could scrap area codes for a single 10-digit format.Thu, 27 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/what-county-is-san-antonio-in/https://dialwick.com/what-county-is-san-antonio-in/82 of San Antonio's 83 ZIP codes sit in Bexar County, Texas; the other reaches into Comal County next door. Bexar itself once covered nearly all of West Texas, before 128 of today's counties were carved out of it.Tue, 25 Aug 2026 00:00:00 GMTCountieshttps://dialwick.com/scottsdale-zip-codes/https://dialwick.com/scottsdale-zip-codes/USPS assigns 15 ZIP codes to Scottsdale, all inside Maricopa County, plus the one real estate agents call the 'Magic Zip Code' because it mails from Scottsdale while most of its homes sit inside Phoenix.Mon, 24 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/las-vegas-area-code/https://dialwick.com/las-vegas-area-code/Las Vegas runs on two area codes today, 702 and 725, but 702 alone covered the entire state of Nevada for more than 50 years before growth split off everywhere outside Clark County.Sun, 23 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/lubbock-zip-codes/https://dialwick.com/lubbock-zip-codes/Every ZIP code USPS assigns to Lubbock, Texas, all inside Lubbock County, plus which of the three unique ones actually belongs to Texas Tech, and the area code that's gone unsplit since 1957.Sun, 23 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/irvine-zip-codes/https://dialwick.com/irvine-zip-codes/All 13 ZIP codes USPS assigns to Irvine, California, entirely inside Orange County, plus the 1960 sale that created UC Irvine and the Northpark strip that still dials on 714 instead of 949.Sat, 22 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/long-beach-zip-codes/https://dialwick.com/long-beach-zip-codes/All 27 ZIP codes GeoNames assigns to Long Beach, California, why the city runs its own health department instead of routing through Los Angeles County, and which codes have almost no residents at all.Sat, 22 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/huntsville-zip-codes/https://dialwick.com/huntsville-zip-codes/All 24 ZIP codes USPS assigns to Huntsville, AL, including the 7 reserved for single addresses like a credit union and a university, and one that sits mostly on Redstone Arsenal.Fri, 21 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/indianapolis-zip-codes/https://dialwick.com/indianapolis-zip-codes/Indianapolis's 63 ZIP codes mostly sit in Marion County, the result of a 1970 city-county merger that absorbed almost everything except four cities that still run their own police, fire, and mayor's office today.Fri, 21 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/miami-area-code/https://dialwick.com/miami-area-code/Miami-Dade and the Florida Keys share three overlapping area codes today. 305 is the original, dating to 1947, back when it covered the entire state of Florida, not just Miami.Thu, 20 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/how-to-call-australia-from-us/https://dialwick.com/how-to-call-australia-from-us/Dial 011, then 61, then the area code with its leading 0 dropped, one of just four area codes that cover the entire country, the last survivors of a renumbering that retired dozens of others.Thu, 20 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/atlanta-area-code/https://dialwick.com/atlanta-area-code/Atlanta runs on five area codes. Three, 404, 678, and 770, ran out of numbers to give out: existing lines still work, but nobody gets a new one from them.Wed, 19 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/fresno-zip-codes/https://dialwick.com/fresno-zip-codes/All 58 ZIP codes USPS assigns to Fresno, California (entirely inside Fresno County), plus the 2010 split that created 93737 and the two ZIPs tied to an IRS tax-processing center that closed in 2021.Tue, 18 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/phoenix-zip-codes/https://dialwick.com/phoenix-zip-codes/Phoenix has 77 ZIP codes, all inside Maricopa County, not because the city stayed small, but because it annexed nearly 500 square miles since 1950, faster than its ZIP list ever needed to reach a second county.Mon, 17 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/cincinnati-zip-codes/https://dialwick.com/cincinnati-zip-codes/Cincinnati's 71 ZIP codes almost all sit in Hamilton County, except one that's a 20,000-person Clermont County suburb, and one that's an 18-box mail drop with no residents at all.Mon, 17 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/richmond-va-zip-codes/https://dialwick.com/richmond-va-zip-codes/Richmond is one of Virginia's 38 independent cities, legally part of no county at all. Its ZIP codes don't honor that line: the full 39-code list, and why 10 of them are filed under Chesterfield or Henrico instead.Sun, 16 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/san-diego-zip-codes/https://dialwick.com/san-diego-zip-codes/San Diego has 76 ZIP codes, and every one sits inside San Diego County, with no split like this site's Denver or Atlanta lists. Three of them, though, belong to a Navy or Marine base instead of a neighborhood.Thu, 13 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/zip-code-shows-wrong-city/https://dialwick.com/zip-code-shows-wrong-city/USPS assigns every ZIP code one official "preferred place name," tied to the post office that services it, not the town the address sits in. That mismatch is documented nationwide, and it recently derailed a Colorado real estate listing.Thu, 13 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/kansas-city-zip-codes/https://dialwick.com/kansas-city-zip-codes/Kansas City is really two cities in two states. Every ZIP for Kansas City, Missouri (71, three counties) and Kansas City, Kansas (15, one county).Thu, 13 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/sacramento-zip-codes/https://dialwick.com/sacramento-zip-codes/Sacramento has 100 ZIP codes, but 59 sit in a block state agencies use for tax filings and other high-volume mail; only 41 actually cover the city's homes and businesses.Wed, 12 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/nyc-area-code/https://dialwick.com/nyc-area-code/NYC runs on eight area codes split into two separate overlay stacks (one for Manhattan, one for the other four boroughs), except for the Manhattan neighborhood that uses neither.Wed, 12 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/houston-zip-codes/https://dialwick.com/houston-zip-codes/Houston has 178 ZIP codes in two postal blocks, and one of them, 77005, belongs to a city that has never joined Houston, while its equally independent neighbor Bellaire got a ZIP name of its own instead.Tue, 11 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/las-vegas-zip-codes/https://dialwick.com/las-vegas-zip-codes/Las Vegas has 77 ZIP codes, and the Strip's own code, 89109, is split between Paradise and Winchester, two unincorporated towns Clark County created to keep the resort corridor out of the city's tax base.Tue, 11 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/denver-zip-codes/https://dialwick.com/denver-zip-codes/Every ZIP code USPS assigns to Denver, CO, and why 11 of the 66 sit in Jefferson or Adams County, not Denver County, despite the city's 1902 consolidation.Mon, 10 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/michigan-area-codes/https://dialwick.com/michigan-area-codes/Michigan has 13 area codes today, seven descended from Detroit's original 313. Here's the full list, plus the split-and-overlay chain behind each one, including the newest, 679.Mon, 10 Aug 2026 00:00:00 GMTArea Code Listshttps://dialwick.com/chicago-area-code/https://dialwick.com/chicago-area-code/312 used to cover all of Chicago and its suburbs. Two splits and an overlay later, it's an enclave, surrounded by 773, inside the same city.Mon, 10 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/nashville-zip-codes/https://dialwick.com/nashville-zip-codes/USPS assigns 39 ZIP codes to Nashville, all in Davidson County, home to the first true city-county merger in the US, and five satellite cities without a ZIP of their own.Sun, 09 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/boston-zip-codes/https://dialwick.com/boston-zip-codes/USPS assigns 36 ZIP codes to "Boston, MA," but City Hall, a federal building, and six once-independent towns that Boston annexed tell the rest of the story.Thu, 06 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/how-to-call-philippines-from-usa/https://dialwick.com/how-to-call-philippines-from-usa/Dial 011, then 63, then the area or mobile code with the leading 0 dropped. Manila's landlines quietly gained an eighth digit in a 2019 regulatory migration.Thu, 06 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/austin-zip-codes/https://dialwick.com/austin-zip-codes/USPS assigns Austin 74 ZIP codes (72 in Travis County and 2 in Williamson), plus two non-geographic codes reserved for the IRS, numbered in a block that looks like it belongs to Puerto Rico.Wed, 05 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/us-country-code/https://dialwick.com/us-country-code/+1 isn't unique to the United States. Canada and 18 Caribbean nations and territories dial out under the same code, and most of them didn't get their own area code until the 1990s.Wed, 05 Aug 2026 00:00:00 GMTInternational Dialinghttps://dialwick.com/dallas-zip-codes/https://dialwick.com/dallas-zip-codes/Every ZIP code USPS assigns to Dallas sits in Dallas County, but four belong to Highland Park, a 2.2-square-mile town independent of Dallas since 1915.Tue, 04 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/chicago-zip-codes/https://dialwick.com/chicago-zip-codes/Every Chicago ZIP code sits in Cook County, but a third aren't neighborhoods. They're dedicated codes for O'Hare, downtown banks, and an electric utility.Tue, 04 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/los-angeles-zip-codes/https://dialwick.com/los-angeles-zip-codes/Los Angeles has 94 ZIP codes that carry the city's own name, and dozens more inside its borders that carry a neighborhood's instead, a split rooted in a 1915 water-rights annexation vote.Tue, 04 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/atlanta-zip-codes/https://dialwick.com/atlanta-zip-codes/Every ZIP code USPS assigns to Atlanta, Georgia, which county each one sits in, and the one Atlanta ZIP that belongs to the IRS, not a neighborhood.Mon, 03 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/new-york-zip-codes/https://dialwick.com/new-york-zip-codes/NYC's five boroughs use 311 ZIP codes, and Queens is the only one where the map runs on neighborhood names, not the borough name itself.Mon, 03 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/texas-zip-codes/https://dialwick.com/texas-zip-codes/Texas doesn't have one ZIP code system, it has a range spanning 73301 to 88595, and the major city with the most ZIP codes isn't the one with the most people.Mon, 03 Aug 2026 00:00:00 GMTZIP Codeshttps://dialwick.com/texas-area-codes/https://dialwick.com/texas-area-codes/Texas has 29 area codes today. Dallas alone stacks four on the same footprint. Here's the full list, plus how Houston, San Antonio, and Austin overlay theirs too.Mon, 03 Aug 2026 00:00:00 GMTArea Code Listshttps://dialwick.com/california-area-codes/https://dialwick.com/california-area-codes/All 41 California area codes, mapped to region and year in service, plus how LA split and overlaid its way from one 1947 code, 213, to seven today.Mon, 03 Aug 2026 00:00:00 GMTArea Code Listshttps://dialwick.com/how-do-area-codes-work/https://dialwick.com/how-do-area-codes-work/A US phone number has three parts, not one. Here is what each part actually identifies, why New York got 212 specifically, and the real difference between a "split" and an "overlay."Mon, 03 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/scam-area-codes/https://dialwick.com/scam-area-codes/Short answer: mostly no. Scammers fake your own area code ("neighbor spoofing"). The one real exception: ten NANP codes tied to the "one ring" scam.Mon, 03 Aug 2026 00:00:00 GMTArea Code Guideshttps://dialwick.com/what-county-is-chicago-in/https://dialwick.com/what-county-is-chicago-in/All 84 of Chicago's ZIP codes sit inside Cook County; only the city's O'Hare strip dips into DuPage. Cook is the second-most-populous US county, and it's growing again, not losing ground to Harris County.Mon, 03 Aug 2026 00:00:00 GMTCountieshttps://dialwick.com/what-county-is-houston-in/https://dialwick.com/what-county-is-houston-in/Houston's 178 ZIP codes sit entirely inside Harris County; only small annexed strips of the city itself dip into Fort Bend and Montgomery. Harris is closing the population gap on Chicago's Cook County.Mon, 03 Aug 2026 00:00:00 GMTCountieshttps://dialwick.com/how-to-call-mexico-from-us/https://dialwick.com/how-to-call-mexico-from-us/011 + 52 + the 10-digit number, and since Mexico's 2019 dialing reform, mobile numbers no longer need an extra digit. A lot of guides online still describe the old, retired format.Mon, 03 Aug 2026 00:00:00 GMTInternational Dialing