TC Systems Inc WARM
d/b/a Teleport Communications Boston
Part of the AT&T group. 74 OCNs across 54 states · 265,508 blocks combined.
Holding: AT&T Inc
2 Teleport Dr, 2nd Floor
Staten Island, NY 10311-1006
AT&T
2001-02-21
2026-02-13
Long shot, but worth calling.
TC Systems Inc issued these blocks a while back. Most of the numbers are probably already with customers, but it's worth calling any you're interested in. If a number isn't in service, it might still be available at TC Systems Inc or one of their resellers.
About AT&T
AT&T Mobility, LLC is a wireless telecommunications provider offering mobile voice, text, and data services across the United States. It primarily serves consumer and business customers through postpaid and prepaid plans. As the third largest wireless carrier with 109.3 million subscribers as of March 31, 2026, it operates a nationwide network including the second-largest 5G footprint.
- Parent: AT&T Inc.
- Founded: 2000
- Headquarters: Brookhaven, GA
- Services: wireless retail, 5G network, postpaid plans, prepaid plans, MVNO hosting
Sources: AT&T Mobility - Wikipedia · Wireless Phone Services: Cell Phones & Phone Plans I AT&T · Complete list of AT&T Wireless MVNO carriers in 2025
Carrier website
att.com: opens in a new tab
HQ: Staten Island, NY
Block portfolio at a glance
By age
- Recent (8). Last 18 mo
- Medium (3)
- Old (199)
- Undated (698)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Massachusetts MA · 908 · 8
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Best vanity numbers from TC Systems Inc's recent issuances
Numbers in blocks issued in the last 18 months whose digits spell a useful word. Filter by state and category to find one for your business. ★ marks Mike's curated standouts.
| Number | Spells | Category | State | Block issued |
|---|---|---|---|---|
| (339) 265-5343 ★ | COLLEGE | Education / College | MA | 2025-07-01 |
| (339) 265-5467 ★ | COLLINS | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-5328 ★ | COLLECTION | Credit Repair / Debt Consolidation | MA | 2025-07-01 |
| (339) 265-3626 ★ | COLEMAN | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-5277 ★ | COLLARS | Pet Care | MA | 2025-07-01 |
| (339) 265-5336 ★ | COLLEEN | Female / Feminine Names | MA | 2025-07-01 |
| (339) 265-5437 ★ | COLLIER | Geography / Local / Directions | MA | 2025-07-01 |
| (339) 265-6746 ★ | COLORING | Art / Crafts / Greeting Cards | MA | 2025-07-01 |
| (339) 265-6463 ★ | COLOGNE | Cosmetics / Beauty Salons | MA | 2025-07-01 |
| (339) 265-3446 ★ | COLEGIO | Education | MA | 2025-07-01 |
| (339) 265-4842 ★ | BOLIVIA | Geography / Local / Directions | MA | 2025-07-01 |
| (339) 265-6877 ★ | COLOURS | Art / Crafts / Greeting Cards | MA | 2025-07-01 |
| (339) 265-8667 ★ | COLUMNS | Building / Construction / Contractor | MA | 2025-07-01 |
| (339) 265-5387 ★ | ANKLETS | Jewelry / Diamonds | MA | 2025-07-01 |
| (339) 265-6733 ★ | COLORED | Art / Crafts / Greeting Cards | MA | 2025-07-01 |
| (339) 265-6626 ★ | COLOMBO | Geography / Local / Directions | MA | 2025-07-01 |
| (339) 265-3883 ★ | COLETTE | Female / Feminine Names | MA | 2025-07-01 |
| (339) 265-2378 ★ | COLBERT | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-6462 ★ | BOLOGNA | Supermarkets / Deli / Groceries | MA | 2025-07-01 |
| (339) 265-4827 ★ | BOLIVAR | Geography / Local / Directions | MA | 2025-07-01 |
| (339) 265-6874 ★ | COLOURING | Music / Stereo / Sound | MA | 2025-07-01 |
| (339) 265-5344 ★ | COLLEGIATE | Education | MA | 2025-07-01 |
| (339) 265-6642 ★ | COLONIAL | History | MA | 2025-07-01 |
| (339) 265-6723 ★ | COLORADO | Geography / Local / Directions | MA | 2025-07-01 |
| (339) 265-6635 ★ | COLONEL | Military / Government / Patriotic | MA | 2025-07-01 |
| (339) 265-5474 ★ | COLLISION | Automotive | MA | 2025-07-01 |
| (339) 265-2876 ★ | COLBURN | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-5464 ★ | BOLLINGER | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-5388 ★ | COLLETTE | Names / Nicknames | MA | 2025-07-01 |
| (339) 265-4283 ★ | COLGATE | Brand Names / Brandable | MA | 2025-07-01 |
Want one of these or something similar? Request the number from this carrier and we'll route the request.
Most recent assignments
Last 18 months. These blocks were issued by TC Systems Inc since 2024-11-14.
| Number block | State | Rate center | Assigned |
|---|---|---|---|
| (774) 599-0XXX | MA | Marlboro | 2026-02-13 |
| (774) 599-1XXX | MA | Marlboro | 2026-02-13 |
| (774) 599-2XXX | MA | Marlboro | 2026-02-13 |
| (339) 265-XXXX | MA | Lexington | 2025-07-01 |
| (339) 265-3XXX | MA | Lexington | 2025-07-01 |
| (339) 265-4XXX | MA | Lexington | 2025-07-01 |
| (339) 265-5XXX | MA | Lexington | 2025-07-01 |
| (339) 265-6XXX | MA | Lexington | 2025-07-01 |
Sister OCNs in the AT&T group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the AT&T group page.
Sister OCNs under AT&T Inc
| OCN | Company | Total | Recent |
|---|---|---|---|
| 6534 | New Cingular Wireless PCS LLC - IL | 58,704 | 6,826 |
| 6214 | New Cingular Wireless PCS LLC - GA | 40,046 | 5,473 |
| 6010 | New Cingular Wireless PCS LLC | 38,106 | 3,019 |
| 4036 | New Cingular Wireless PCS LLC - DC | 30,944 | 4,342 |
| 9533 | Southwestern Bell Telephone Company | 26,095 | 0 |
| 9740 | Pacific Bell Telephone Company | 18,541 | 0 |
| 9417 | Bellsouth Telecommunications Inc dba Southern Bell Telephone & Telegraph | 15,734 | 0 |
| 9419 | Bellsouth Telecommunications Inc dba South Central Bell Telephone | 13,075 | 0 |
| 9329 | Ameritech Illinois | 6,645 | 0 |
| 516C | AT&T Enterprises LLC | 5,935 | 113 |
| 9323 | Ameritech Michigan | 5,035 | 0 |
| 9321 | Ameritech Ohio | 4,377 | 0 |