If you’ve ever tried to call someone in certain parts of Mexico, you may have noticed an unfamiliar area code – 637. This code serves a specific region of the country, and understanding its history and usage can be helpful for those making calls to or from this area.
Area code 637 was introduced in 2018 to provide additional phone number capacity for the growing population in the states of Guerrero and Oaxaca. Prior to this, the region was served by the 744 area code, which was becoming overwhelmed. By splitting off a new code, it allowed for the creation of millions of additional phone numbers to meet increasing demand.
The 637 area code primarily covers the central
Coastal parts of the state of Guerrero, including the major cities of Acapulco, Chilpancingo, and Iguala. It also serves a small portion of northwestern Oaxaca state. In total, around 2.5 million people live within the 637 area.
One key thing to note about 637 is that it is an overlay code, meaning it shares the same geographic territory as the pre-existing 744 area code. This means that all numbers in this region, whether Bank User Number have 637 or 744, are considered local calls to each other. When dialing between the two codes, you do not need to dial 1 or any additional digits – you can just use the 7-digit local number.
The introduction of 637 was a bit of a transition for residents and businesses in the affected areas. Prior to 2018, everyone had 744 numbers. Now, new phone lines are being assigned 637 area codes, while existing 744 numbers are being grandfathered in. This means you’ll see a mix of the two codes being used.
For those making calls to Guerrero or Oaxaca from elsewhere in Mexico or internationally. It’s important to always dial the full 10-digit number, including the area code. Trying to just use a 7-digit local number won’t work. The country code for Mexico is 52. So a full international call to someone with a 637 number would be dialed as 52-637-XXX-XXXX.
One thing that can cause some confusion
Is that Mexican area codes don’t always perfectly align with state borders. While 637 primarily covers Guerrero, it also bleeds into a small Argentina Phone Number List of Oaxaca. Similarly, the 744 code that 637 was split from also extends into parts of other states. So when looking up a number, you’ll want to double check which exact area code serves that location.
Overall, the addition of area code 637 was a necessary move to support. The communication needs of the growing population in southern Mexico. For those making calls to the region, just be sure to use. The full 10-digit number to reach your party successfully. And if you ever travel to Acapulco or other parts of Guerrero. You may notice both the new 637 and legacy 744 area codes in use side-by-side.
