Onvoy LLC - DC WARM
d/b/a Neutral Tandem
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
(312) 384-8000
2006-03-09
2026-03-19
Long shot, but worth calling.
Onvoy LLC - DC 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 Onvoy LLC - DC or one of their resellers.
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 (37). Last 18 mo
- Medium (60)
- Old (587)
- Undated (4)
Footprint by state
Stronger blue = more blocks issued in that state. ● marks states with activity in the last 18 months.
- District of Columbia DC · 688 · 37
Top area codes
Bars show total blocks; red overlay is recent.
Block assignments by year
Best vanity numbers from Onvoy LLC - DC'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 |
|---|---|---|---|---|
| (771) 247-7678 ★ | AIRPORT | Aviation / Airlines / Flying | DC | 2024-11-21 |
| (771) 253-2646 ★ | CLEANING | Cleaning Services / Laundry | DC | 2025-06-25 |
| (771) 253-2674 ★ | CLEANSING | Cleaning Services / Laundry | DC | 2025-06-25 |
| (771) 253-7733 ★ | BLESSED | Religious / Faith / Church | DC | 2025-06-25 |
| (771) 247-5463 ★ | AIRLINE | Aviation / Airlines / Flying | DC | 2024-11-21 |
| (771) 247-6642 ★ | CHRONIC | Pain Related | DC | 2024-11-21 |
| (771) 247-7638 ★ | AIRSOFT | Sports / Athletics | DC | 2024-11-21 |
| (771) 253-7336 ★ | ALFREDO | Male / Masculine Names | DC | 2025-06-25 |
| (771) 253-2244 ★ | BLEACHING | Health Care / Medical | DC | 2025-06-25 |
| (771) 253-6676 ★ | ALFONSO | Names / Nicknames | DC | 2025-06-25 |
| (771) 253-2746 ★ | CLEARING | Rental / Leasing | DC | 2025-06-25 |
| (771) 253-2759 ★ | CLEARLY | Vision / Optometry / Glasses | DC | 2025-06-25 |
| (771) 253-6367 ★ | CLEMENS | Names / Nicknames | DC | 2025-06-25 |
| (771) 253-8467 ★ | BLEVINS | Names / Nicknames | DC | 2025-06-25 |
| (771) 253-6333 ★ | BLENDED | Beverages / Drinks | DC | 2025-06-25 |
| (771) 247-6527 ★ | BIPOLAR | Mental Health / Emotions / Attitude | DC | 2024-11-21 |
| (771) 253-6766 ★ | CLEMSON | Education / College | DC | 2025-06-25 |
| (771) 253-7424 ★ | ALDRICH | Names / Nicknames | DC | 2025-06-25 |
| (771) 247-7275 ★ | AIRPARK | Aviation / Airlines / Flying | DC | 2024-11-21 |
| (771) 249-2773 ★ | BIZARRE | Crazy / Bizarre / Weird | DC | 2025-01-08 |
| (771) 253-9263 ★ | ALEXANDER | Names / Nicknames | DC | 2025-06-25 |
| (771) 253-3763 ★ | BLEDSOE | Automotive | DC | 2025-06-25 |
| (771) 253-6667 ★ | CLEMONS | Names / Nicknames | DC | 2025-06-25 |
| (771) 253-2726 ★ | CLEARANCE | Retail Stores | DC | 2025-06-25 |
| (771) 247-7355 ★ | BISSELL | Sales / Call to Action / Marketing | DC | 2024-11-21 |
| (771) 253-2633 ★ | CLEANED | Cleaning Services / Laundry | DC | 2025-06-25 |
| (771) 253-2532 ★ | ALFALFA | Supermarkets / Deli | DC | 2025-06-25 |
| (771) 247-5438 ★ | AIRLIFT | Aviation / Airlines / Flying | DC | 2024-11-21 |
| (771) 253-6474 ★ | BLEMISH | Cosmetics / Beauty Salons | DC | 2025-06-25 |
| (771) 253-2733 ★ | CLEARED | General | DC | 2025-06-25 |
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 - DC since 2024-11-14.
| Number block | State | Rate center | Assigned |
|---|---|---|---|
| (202) 490-7XXX | DC | Wshngtnzn1 | 2026-04-27 |
| (202) 490-8XXX | DC | Wshngtnzn1 | 2026-04-27 |
| (202) 490-9XXX | DC | Wshngtnzn1 | 2026-04-27 |
| (202) 349-6XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 443-4XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 490-XXXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 490-0XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 558-1XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 880-8XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (771) 209-9XXX | DC | Wshngtnzn1 | 2026-04-09 |
| (202) 589-7XXX | DC | Wshngtnzn1 | 2026-03-19 |
| (202) 589-8XXX | DC | Wshngtnzn1 | 2026-03-19 |
| (202) 589-9XXX | DC | Wshngtnzn1 | 2026-03-19 |
| (771) 254-1XXX | DC | Wshngtnzn1 | 2025-10-14 |
| (771) 254-9XXX | DC | Wshngtnzn1 | 2025-10-14 |
| (771) 253-XXXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-0XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-1XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-2XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-3XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-4XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-5XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-6XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-7XXX | DC | Wshngtnzn1 | 2025-06-25 |
| (771) 253-8XXX | DC | Wshngtnzn1 | 2025-06-25 |
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 |
| 483E | Onvoy LLC - WA | IL | 3,106 | 3 |
| 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 |
| 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 |