Phone numbers in Kirkland, Washington
Kirkland has 80 phone prefixes in area code 425.
Biggest holders: Ziply Fiber, Level 3 (Lumen), Teleport Communications America. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 6%
- Local phone company 51%
- Internet / business phone carrier 41%
- Phone company 1%
Every prefix in Kirkland
Search the first six digits of a number in this list. If it's here, the number started in Kirkland with the carrier shown. If it isn't, check the Washington page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 425-202 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 425-216 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 425-242 | Teleport Communications America | Internet / business phone carrier | 2001 |
| 425-250 | Allstream | Internet / business phone carrier | – |
| 425-284 | Allstream | Internet / business phone carrier | – |
| 425-285 | Allstream | Internet / business phone carrier | 2001 |
| 425-296 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-298 | Windstream (PAETEC) | Internet / business phone carrier | 2008 |
| 425-305 | Level 3 (Lumen) | Internet / business phone carrier | 2014 |
| 425-307 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-376 | Ziply Fiber | Local phone company | – |
| 425-380 | AT&T Mobility | Mobile carrier | 2022 |
| 425-403 | AT&T Mobility | Mobile carrier | 2019 |
| 425-406 | CenturyLink / Lumen | Local phone company | – |
| 425-421 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-447 | Ziply Fiber | Local phone company | 2017 |
| 425-448 | Onvoy | Internet / business phone carrier | – |
| 425-497 | Ziply Fiber | Local phone company | – |
| 425-498 | Ziply Fiber | Local phone company | – |
| 425-506 | Teleport Communications America | Internet / business phone carrier | 2021 |
| 425-522 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 425-538 | Ziply Fiber | Local phone company | 2007 |
| 425-544 | Ziply Fiber | Local phone company | 2017 |
| 425-553 | Comcast | Internet / business phone carrier | 2016 |
| 425-556 | Ziply Fiber | Local phone company | – |
| 425-558 | Ziply Fiber | Local phone company | – |
| 425-560 | FIVE9 | Phone company | 2024 |
| 425-576 | Ziply Fiber | Local phone company | – |
| 425-580 | Ziply Fiber | Local phone company | – |
| 425-587 | Teleport Communications America | Internet / business phone carrier | – |
| 425-588 | AT&T Mobility | Mobile carrier | 2016 |
| 425-602 | Teleport Communications America | Internet / business phone carrier | – |
| 425-605 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-629 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-636 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 425-650 | Onvoy | Internet / business phone carrier | – |
| 425-655 | AT&T Mobility | Mobile carrier | 2018 |
| 425-658 | Onvoy | Internet / business phone carrier | – |
| 425-702 | Ziply Fiber | Local phone company | – |
| 425-703 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 425-704 | Ziply Fiber | Local phone company | – |
| 425-705 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 425-706 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 425-707 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 425-708 | Ziply Fiber | Local phone company | 2001 |
| 425-722 | Level 3 (Lumen) | Internet / business phone carrier | 2018 |
| 425-727 | Ziply Fiber | Local phone company | – |
| 425-739 | Ziply Fiber | Local phone company | – |
| 425-755 | Ziply Fiber | Local phone company | – |
| 425-803 | Ziply Fiber | Local phone company | – |
| 425-814 | Ziply Fiber | Local phone company | – |
| 425-820 | Ziply Fiber | Local phone company | – |
| 425-821 | Ziply Fiber | Local phone company | – |
| 425-822 | Ziply Fiber | Local phone company | – |
| 425-823 | Ziply Fiber | Local phone company | – |
| 425-825 | Ziply Fiber | Local phone company | – |
| 425-827 | Ziply Fiber | Local phone company | – |
| 425-828 | Ziply Fiber | Local phone company | – |
| 425-836 | Ziply Fiber | Local phone company | – |
| 425-845 | Onvoy | Internet / business phone carrier | 2022 |
| 425-861 | Ziply Fiber | Local phone company | – |
| 425-867 | Ziply Fiber | Local phone company | – |
| 425-868 | Ziply Fiber | Local phone company | – |
| 425-869 | Ziply Fiber | Local phone company | – |
| 425-881 | Ziply Fiber | Local phone company | – |
| 425-882 | Ziply Fiber | Local phone company | – |
| 425-883 | Ziply Fiber | Local phone company | – |
| 425-885 | Ziply Fiber | Local phone company | – |
| 425-889 | Ziply Fiber | Local phone company | – |
| 425-893 | Ziply Fiber | Local phone company | – |
| 425-895 | Ziply Fiber | Local phone company | – |
| 425-896 | Teleport Communications America | Internet / business phone carrier | – |
| 425-897 | Teleport Communications America | Internet / business phone carrier | – |
| 425-898 | Ziply Fiber | Local phone company | – |
| 425-899 | Ziply Fiber | Local phone company | – |
| 425-936 | Ziply Fiber | Local phone company | – |
| 425-947 | Level 3 (Lumen) | Internet / business phone carrier | – |
| 425-952 | Allstream | Internet / business phone carrier | – |
| 425-968 | MCImetro (Verizon Business) | Internet / business phone carrier | – |
| 425-979 | AT&T Mobility | Mobile carrier | 2015 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.