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Corporate Or Business Office in San Marcos
58 corporate or business office businesses in San Marcos, United States. All San Marcos businesses →
At a glance
As of October 2026, business.wiki lists 58 corporate or business office businesses in San Marcos— 0.7% of the city's 8,221 listed businesses. 98% publish a phone number and 95% have a website, spread across 31 postcode districts. The largest local presence is AT&T with 2 locations in the city.
Where in San Marcos: 92078 (16)·78666 (8)·92069 (3)·78666-5257 (2)·92069-1445 (2)·78666-2052 (1)·78666-4657 (1)·78666-6198 (1)
Directory — top 30 by data completeness
| Business | Address | Postcode | Phone | Web |
|---|---|---|---|---|
| AT&T | 133 S Las Posas Rd | 92078-2468 | +18552937676 | ✓ |
| Verizon Business Services | 711 Center Dr | 92069-3500 | +18666444532 | ✓ |
| Hays Energy Project | 1601 Frances Harris Ln | 78666-8967 | +15128057200 | ✓ |
| Flex-Tech Hose & Tubing | 1100 Civic Center Loop | 78666-9589 | +18009782667 | ✓ |
| Astound Broadband | 401 Carlson Cir | 78666-6730 | +18004278686 | ✓ |
| On The River Poker Club | 700 N LBJ Dr | 78666-4657 | +15122108435 | ✓ |
| Matheson | 1530 Grand Ave | 92078-2408 | +17607449353 | ✓ |
| MGM Plastics | 235 Bingham Dr | 92069-1445 | +17607448909 | ✓ |
| Southwest Texas District HQ - PCG | 3107 Ranch Road 12 | 78666 | (512) 353-8595 | ✓ |
| AT&T | 651 Barnes Dr | 78666-6198 | +17373736227 | ✓ |
| Telecom America Services | 2019 Clovis R Barker Rd | 78666-5257 | +15127549150 | ✓ |
| Platinum Communications | 2019 Clovis R Barker Rd | 78666-5257 | +12105804747 | ✓ |
| Altra Industrial Motion | 2000 Clovis R Barker Rd | 78666-9792 | +15129381300 | ✓ |
| Baron Energy | 300 S C M Allen Pkwy | 78666-6900 | +15123925775 | ✓ |
| Plex Integrated System Solutions | 115 Warden Ln | 78666-6549 | +15124003002 | ✓ |
| Blue Jug Alkaline Water | 1023 Highway 80 | 78666-8136 | +15129311512 | ✓ |
| Grande Communications | 401 Carlson Cir | 78666 | (866) 247-2633 | ✓ |
| Alamo Tech llc | 1101 Thorpe Ln | 78666-7105 | +18303593599 | ✓ |
| Indeco Products Inc | 140 Ridge Dr | 78666-2052 | +15123965814 | ✓ |
| Daswave | 1650 Linda Vista Dr | 92078-3810 | +19497775479 | ✓ |
| Traffic School California - IMPROV San Diego | 1740 La Costa Meadows Dr #143 | 92078 | (800) 660-8908 | ✓ |
| Parity Networks | 678 Merit Dr | 92078-1402 | +16198940284 | ✓ |
| X Flo Systems | 225 S Bent Ave | 92078-1226 | +17607467400 | ✓ |
| Advanced Honeycomb Technologies | 1015 Linda Vista Dr Ste C | 92078 | (760) 744-3200 | ✓ |
| Pinnacle Services | 1259 Linda Vista Dr | 92078 | (619) 639-1964 | ✓ |
| Pacific Lasertec, LLC | 215 Bingham Dr | 92069-1403 | +17605397169 | ✓ |
| Fiber Reinforced Products | 235 Bingham Dr | 92069-1445 | +17607448909 | ✓ |
| Telcomtec | 120 N Pacific St | 92069-1224 | +18005644045 | ✓ |
| Aquaneering | 340 Rancheros Dr | 92069-2900 | +18585782028 | ✓ |
| Golden Telecom | 1308 Descanso Ave | 92069-1306 | +17604388383 | ✓ |
Showing the 30 most complete records of 58 total. Every listed business has its own page with map, nearby competitors and city context.
About this data
Counts are computed live from our database of 8,221 San Marcos businesses, built on open data from the Overture Maps Foundation and refreshed with each monthly release. Cite as: “business.wiki, Corporate Or Business Office in San Marcos (October 2026)”.