Living in San Antonio, the area code 210 feels like a long-standing tradition that is everywhere.

Whether making a restaurant reservation, calling a repairman, or contacting a hospital, it seems like the 210 area code has been around for quite some time.

The associations of 212 with New York and 213 with LA also contribute to the feeling that 210 is an older number.

Just looking at the numbers, since 210 comes before 212 and 213, it leads people to mistakenly think it is an older number.

In reality, 212 and 213 are among the original area codes that have been in use since the area code system began in 1947, while 210 was created much later. Still, the number 210 has a strangely old feel to it. When read digit by digit, it feels concise and straightforward, making it easy to mistake for an old city code.

Especially since San Antonio has a stronger historical and traditional image compared to modern cities like New York or LA, the perception of the number also seems to reflect a sense of time gone by.

However, there is a twist... The reason the area code 210 seems old is just because the number is lower, and surprisingly, 210 is not that old of a number. The area code system in the U.S. was first established in 1947, and at that time, Texas was so vast with few cities that a small number of codes was sufficient. This area, where San Antonio is located, was covered by just 512 for a while.

Yes, the 512 area code, which now feels like a symbol of Austin, actually included San Antonio at one point. The population was not as large as it is now, and having one phone per household was considered well-off, so there was no shortage of numbers. Then, starting in the late 1980s, the situation changed. With the overlapping characteristics of a military city, a tourist city, and a medical city, the population of San Antonio grew rapidly, and the demand for numbers increased significantly with the addition of fax machines, business phones, and modems.

Ultimately, in 1992, the area code 210 was created by separating San Antonio and its surrounding areas.

It's more recent than you might think. By today's standards, it's just a little over 30 years old. The reason people perceive 210 as an old number is also due to the city's image. With strong historical landmarks like the Alamo, River Walk, and missions, it's natural to connect that to the idea that the phone number would also be old.

Interestingly, as the population of San Antonio continued to grow and mobile phones exploded in number, an overlay area code 726 was added in 2017. Now, people living in the same neighborhood or building could have either 210 or 726.

Nevertheless, people still feel that 210 is the true San Antonio number. It is said that even those who move to other cities often choose not to change their phone numbers and continue using 210. This area code feels like an identity of the neighborhood they used to live in.