Home | About me | Contact | What's new | Privacy | Search

San Antonio
Freeway system
Other roads
  Alt intersections
  Bandera Rd proposals
  Cibolo Parkway
  The Circuit
  Hry Wz/Aus Hwy SPUI
  I-10 Boerne Projects
  I-35/SA-Aus Corridor
  I-35 Comal Projects
  LP 1604 South Projects
  SH 130
  SH 211
  Loop addressing
  Which Military?
  Which Wurzbach?

Search this site
This site is not affiliated with any official agency.





Other San Antonio Area Roads
Loop addressing 

This page last updated January 3, 2013

San Antonio unfortunately suffers from a mind-boggling, arcane and bewildering addressing system and it's two loops are no exception. The start with, both Loop 410 and Loop 1604 use different naming and numbering systems. Once you've mastered that, you quickly realize that the demarcation between the segments is not clearly deliniated. If that wasn't enough, the numbering pattern is not always consistent even on the same loop.

So let's take a look at each loop individually below.

Loop 410

Of the two loops, Loop 410 has the easiest basic layout to understand. It's divided into four quadrants: NW, NE, SE, and SW.  So it can help to visualize it as a diamond:

Loop 410 addressing

Note that the dividing lines for each segment are approximate. For example, there is at least one NE Loop 410 address west of McCullough. The addressing for NW and NE segments starts at the north and works southward. Addressing for the SW and SE segments, however, also works southward. The numbering for SW Loop 410 resets near SH 151 and increases from there; for SE Loop 410, the numbering restarts near I-10 East. On NW and NE Loop 410, the addresses essentially start at zero instead of 100 like on most "normal" numbering plans, but appears to start with 100 for the SW and SE segments. On the southside, part of the Loop 410 access road is actually Chavaneaux Rd., so that street's numbering is used there. On the northeast side where Loop 410 and I-35 run concurrent, I-35's addressing is used.

For the directional indicators on the highway itself, the dividing lines are I-35 on both the north and south sides of town, I-37 on the southeast side, and Bandera Rd. on the northwest side. For instance, westbound Loop 410 becomes southbound Loop 410 at Bandera Rd.

Loop 1604

Loop 1604's basic layout is quite a bit more complex, although when you break it down, it's not quite as intimidating as it might initially seem. First of all, the loop is divided into four quadrants: North, East, South, and West. However, each quadrant is then split into two halves: West and East or North and South. So it helps to think of each quadrant as it's own street with directional divisions. For instance, just like Commerce Street is divided into East and West halves, North Loop 1604 and South Loop 1604 are also divided into East and West halves. Similarly, just as Zarzamora Street is divided into North and South sections, so are West Loop 1604 and East Loop 1604. So it might help to visualize Loop 1604 as a square with each side then divided into two:

Loop 1604 addressing

Again, like with Loop 410, the dividing lines for each segment are not exact, so some numbering may "bleed over" the streets shown. Fortunately, unlike Loop 410, the numbering plan is much more consistant on Loop 1604. The numbering starts in the middle of each quadrant and works outward, just as it does for Commerce and Zarzamora streets. However, the naming convention for Loop 1604 can get quite confusing in a hurry. The rule is that the quadrant name comes first and preceeds "Loop 1604"; the directional half is then tacked onto the end. (This, of course, is different than regular street names like Commerce and Zarzamora where the directional half is prefixed, e.g. East Commerce and South Zarzamora.) So 1000 West Loop 1604 North would be on the west quadrant of Loop 1604 not far north of Potranco, but 1000 North Loop 1604 West would be on the north quadrant of Loop 1604 a short distance west of Stone Oak. Those are quite a ways apart, so you can see that the order of the directional markers is quite important! Complicating all of this is the fact that lots of folks along Loop 1604 don't understand this addressing system and list their addresses wrong. It's not uncommon see addresses like 1000 Loop 1604 W or 1000 NW Loop 1604. The post office usually is able to find them because of their ZIP code, so that can be helpful in narrowing it down if you have that and access to a ZIP code map. Otherwise, if you're searching for such an address, a phone call is likely in order to get directions or at least the nearest cross street.

As for the directional indicators on the highway itself, the dividing lines are mostly the same as those for the addressing with one exception: Benton City Rd. is the dividing line on the southwest corner instead of Somerset Rd. For instance, westbound Loop 1604 becomes southbound Loop 1604 at Bandera Rd. That's also where North Loop 1604 West becomes West Loop 1604 North!


This is San Antonio, the home of loops and wonky addressing. When the two are combined, it can make for some real fun! Take this advice: unless you know exactly where you're going (Google Maps can actually be pretty helpful, even on our loops), call your destination ahead of time and get directions. It will likely save you lots of frustration and gas!  

If you found this informative, please consider making a small donation to help support it. Thanks!
This page and all its contents are Copyright 2019 by Brian Purcell

The information provided on this website is provided on an "as-is" basis without warranties of any kind either express or implied.  The author and his agents make no warranties or representations of any kind concerning any information contained in this website.  This website is provided only as general information.  The author expressly disclaims all liability with respect to actions taken or not taken based upon the information contained herein or with respect to any errors or omissions in such information.  All opinions expressed are strictly those of the author.  This site is not affiliated in any way with any official agency.