Onvoy LLC - WA COLD
d/b/a Neutral Tandem-Washington LLC
Part of the Onvoy group. 41 OCNs across 41 states · 159,817 blocks combined.
1 S Wacker Dr, Suite 200
Chicago, IL 60606-4614
Onvoy
2001-09-27
2026-02-20
Several years old. Contact the number directly.
Onvoy LLC - WA issued these blocks several years ago. Customers swap carriers every few years, so Onvoy LLC - WA probably no longer holds them. Try calling any number you're interested in. If a person answers, you've found the current owner and can negotiate with them.
A long shot: if you'd like a watch in case we ever gain access to Onvoy LLC - WA's inventory directly, you can register your interest. We don't currently have visibility into number changes within carriers, so don't count on it.
About Onvoy
Onvoy, LLC is a US telecommunications carrier providing wholesale voice and messaging services, including VoIP/SIP, toll-free, SMS, and 911 enablement, primarily to carriers, cable operators, wireless providers, VoIP/OTT companies, and integrators. It operates nationwide switching and transport infrastructure and is the third largest CLEC by rate center coverage. Onvoy is part of the Sinch Group following acquisitions involving Inteliquent and earlier GTCR ownership.
- Parent: Sinch Group
- Founded: 1991
- Headquarters: Plymouth, MN
- Services: wholesale VoIP/SIP, toll-free services, SMS messaging, 911 enablement, SIP trunking, tandem switching
Sources: Onvoy - OCOLO · GTCR Announces Acquisition of Onvoy - PR Newswire · Onvoy, LLC - Sinch [PDF]
Toll-free side: Related toll-free RespOrg: Inteliquent (code HPC01). View on resporgs.com →
Carrier website
sinch.com: opens in a new tab
HQ: Chicago, IL
Block portfolio at a glance
By age
- Recent (3). Last 18 mo
- Medium (14)
- Old (2,647)
- Undated (442)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- Washington WA · 3,106 · 3
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Best vanity numbers from Onvoy LLC - WA'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 |
|---|---|---|---|---|
| (564) 263-6837 ★ | ANDOVER | Geography / Local / Directions | WA | 2026-02-20 |
| (564) 263-6772 ★ | ANDORRA | Geography / Local / Directions | WA | 2026-02-20 |
| (564) 263-6489 ★ | AMENITY | Hotel / Hospitality | WA | 2026-02-20 |
| (509) 437-3342 ★ | HEREDIA | Geography | WA | 2026-02-20 |
| (564) 263-6484 ★ | AMENITIES | Travel / Hotels | WA | 2026-02-20 |
| (509) 437-3464 ★ | HERDING | Farming / Agriculture / Veterinary | WA | 2026-02-20 |
| (509) 437-3336 ★ | IFREEDOM | Free | WA | 2026-02-20 |
| (564) 263-6673 | ANDMORE | Kitchen / Appliances / Cabinets | WA | 2026-02-20 |
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 Onvoy LLC - WA since 2024-11-14.
| Number block | State | Rate center | Assigned |
|---|---|---|---|
| (206) 807-6XXX | WA | Seattle | 2026-02-20 |
| (509) 437-3XXX | WA | Spokane | 2026-02-20 |
| (564) 263-6XXX | WA | Olympia | 2026-02-20 |
Sister OCNs in the Onvoy group
Same customer-facing carrier, different state-registered OCN. Combined stats are on the Onvoy group page.
| OCN | Company name on file | HQ state | Total | Recent |
|---|---|---|---|---|
| 649C | Onvoy LLC - CA | IL | 21,516 | 889 |
| 903C | Onvoy LLC - TX | IL | 15,066 | 595 |
| 937C | Onvoy LLC - FL | IL | 11,145 | 1,122 |
| 384C | Onvoy LLC - NY | IL | 9,958 | 478 |
| 547E | Onvoy LLC - PA | IL | 8,313 | 505 |
| 067D | Onvoy LLC - GA | IL | 6,330 | 279 |
| 543C | Onvoy LLC V - MI | IL | 5,779 | 14 |
| 638E | Onvoy LLC - NC | IL | 5,384 | 321 |
| 637C | Onvoy LLC - NJ | IL | 5,188 | 490 |
| 097D | Onvoy LLC - IN | IL | 4,545 | 176 |
| 892D | Onvoy LLC - MA | IL | 4,351 | · |
| 138E | Onvoy LLC - VA | IL | 4,341 | 380 |
| 604E | Onvoy LLC - AL | IL | 4,230 | 90 |
| 093F | Onvoy LLC - MO | IL | 4,204 | 208 |
| 184D | Onvoy LLC - MN | IL | 3,892 | 9 |
| 225C | Onvoy LLC - WI | IL | 3,477 | 181 |
| 026D | Onvoy LLC - CO | IL | 3,190 | 93 |
| 876D | Onvoy LLC - MD | IL | 3,090 | 253 |
| 749E | Onvoy LLC - LA | IL | 2,987 | 127 |
| 630E | Onvoy LLC - AZ | IL | 2,936 | 11 |
| 221F | Onvoy LLC - IA | IL | 2,799 | 25 |
| 750E | Onvoy LLC - OR | IL | 2,458 | 126 |
| 409F | Onvoy LLC - OK | IL | 2,425 | 78 |
| 548E | Onvoy LLC - SC | IL | 2,418 | 126 |
| 205F | Onvoy LLC - KS | IL | 2,071 | 74 |
| 639C | Onvoy LLC - CT | IL | 1,783 | 64 |
| 348F | Onvoy LLC - AR | IL | 1,771 | 162 |
| 871E | Onvoy LLC - UT | IL | 1,634 | 57 |
| 549E | Onvoy LLC - NE | IL | 1,524 | 41 |
| 029F | Onvoy LLC - NV | IL | 1,402 | 44 |
| 206F | Onvoy LLC - NM | IL | 1,263 | 46 |
| 449F | Onvoy LLC - WV | IL | 1,168 | 12 |
| 850D | Onvoy LLC - DC | IL | 688 | 37 |
| 451F | Onvoy LLC - VT | IL | 652 | 17 |
| 450F | Onvoy LLC - WY | IL | 626 | 27 |
| 969E | Onvoy LLC - DE | IL | 608 | 27 |
| 452F | Onvoy LLC - ND | IL | 502 | · |
| 977E | Onvoy LLC - RI | IL | 463 | 21 |
| 210H | Onvoy LLC - HI | IL | 365 | 20 |
| 559F | Neutral Tandem - PR | IL | 169 | 12 |