Alberto Caraballo
Press a key in Monterrey and something has to happen in Dallas.
That is the reality for a large share of gamers in northern Mexico. The matchmaking servers for many of the titles they play every night, from tactical shooters to battle royales, sit in Texas. Riot Games, to name one, operates part of its North American server infrastructure in Dallas. So every shot fired, every ability cast, every jump timed at the edge of a platform makes the same trip: south to north, across the border, and back.
In a straight line, Monterrey and Dallas are about 850 kilometers apart. Light traveling through optical fiber covers that distance quickly. Quickly enough that the round trip, by physics alone, should take under 10 milliseconds.
Most players in the region see something closer to 40.
This article is the story of the other 30.
The trip light could make
Fiber does not carry light at its full speed. The glass slows it down to roughly 204,000 kilometers per second, which works out to about 5 microseconds for every kilometer traveled. That number is worth keeping, because it turns any route on a map into a latency figure.
Fiber also does not travel in straight lines. It follows highways, railways and rights of way. A realistic fiber path from Monterrey to Dallas runs north to the border, crosses at Laredo, then continues through San Antonio and up the I-35 corridor: somewhere close to 1,000 kilometers in total, taking the road corridors fiber typically follows as a reference.
Run the math on that route and you get about 5 milliseconds each way. Ten for the round trip. Add the small delays that routers and equipment introduce along the path and a well built connection still lands comfortably under 15 milliseconds.
For a gamer, that range means something specific. Research on competitive first person shooter players found that the lag compensation built into modern games can mask latency reasonably well up to about 50 milliseconds, with performance degrading sharply beyond that point. Competitive players chase pings under 20. A connection in the 10 to 15 millisecond range is not a luxury figure. It is the range where the network disappears and only the player’s skill is left.
The physics allows it. So why does the screen say 40?
The trip the packet actually makes
There is a way to measure the gap between what fiber allows and what routes deliver, and the numbers on this corridor tell a clear story.
WonderNetwork, which runs continuous ping measurements between hundreds of cities, reports Mexico City to Dallas at around 32 milliseconds. The straight line distance between those cities is roughly 1,500 kilometers, which means the measured route operates at about 47 percent of the speed that light in fiber allows. Less than half.
Nobody designed this on purpose, and that matters for understanding it. Mexican networks grew in the direction the internet pulled them. For decades, the content, the major carriers and the exchange points were concentrated in cities like Dallas and Miami, so that is where Mexican operators built toward. Traffic from northern Mexico has long been routed through the United States because that is where its destinations lived. Every network involved made the rational choice for the map that existed at the time.
The result is a version of what network engineers call the trombone effect: traffic that travels to a distant point of exchange and back, even when its origin and destination are much closer together. A packet from Monterrey might enter one network, ride hundreds of kilometers past the city where its game server lives, hand off to another network at an interconnection point, and ride partway back. Each detour is invisible to the player. Together, they are most of the ping.
And the route collects its toll before the match even starts. Connecting securely to a game service takes several round trips between player and server: establishing the connection, verifying certificates, exchanging encryption keys. Modern protocols have trimmed that number, but every round trip that remains pays the full length of the route. On a long path, a login that could take a few dozen milliseconds climbs well past a hundred.
Distance, it turns out, is the smallest part of the number on the screen. The route is the rest.
The trip that is now possible
Here is what changed: the map.
The border has quietly become one of the densest meeting points for Mexican networks anywhere, including inside Mexico itself. Operators from across the country reach cities like McAllen, Laredo and El Paso as a natural extension of their backbones. And over the past decade the other side of the equation arrived too, as content platforms, CDNs and gaming companies began connecting at the same points, drawn by the concentration of Mexican networks they needed to reach.
When both sides of a connection meet at the border itself, the geometry of the route changes. A packet from Monterrey no longer needs to ride deep into the United States to find the network that will carry it home. The exchange happens at the crossing, a couple hundred kilometers from the player, and the path to Dallas gets close to the straight line the physics always allowed. This is the role that neutral interconnection at the border plays today. Platforms like MEX-IX, the internet exchange MDC operates in McAllen and El Paso, exist precisely so that Mexican networks and content or gaming providers can exchange traffic at the point where their paths naturally meet.
None of this requires new physics. The fiber was always fast enough. What the border adds is a shorter conversation: fewer networks in the chain, fewer detours, an exchange point sitting on the route instead of far beyond it.
A snapshot, not a destiny
Mexico closed 2025 with 73.8 million gamers, a figure expected to pass 75 million in 2026. That is a population the size of a large country, pressing keys and expecting the screen to answer instantly.
For that population, 40 milliseconds is not a law of nature. It is a snapshot of how routes were built for an older map. The physical floor for Monterrey to Dallas sits near 10 milliseconds, and more of the infrastructure needed to approach it is already in place, sitting quietly at the border, exactly where the geography says it should be.
The next time your ping counter settles on a number, remember that only a fraction of it is distance. The rest is the route. And routes, unlike physics, can change.
