Holbrook, NY Area Codes
Holbrook, New York (population 26,256) uses area codes 631 and 934.
Holbrook has no telephone exchange of its own in NANPA records; it is served by the Ronkonkoma exchange about 4.7 km away.
Carriers with Holbrook numbers
28 prefixes are assigned to the Ronkonkoma exchange: 11% mobile, 32% VoIP and cable, 57% landline.
| Carrier | Prefixes |
|---|---|
| Verizon | 10 |
| T-Mobile | 3 |
| Verizon Business (MCImetro) | 3 |
| Onvoy (Sinch) | 2 |
| Lumen (Level 3) | 2 |
| Cablevision Lightpath | 2 |
| Paetec Itel | 1 |
| Telengy L.L.C. | 1 |
Area codes used in Holbrook
| Area code | Prefixes serving Holbrook | Main carriers in this code |
|---|---|---|
| 631 | 24 | Verizon, Verizon Business (MCImetro), T-Mobile |
| 934 | 4 | Onvoy (Sinch), Fractel, T-Mobile |
Holbrook phone number prefixes
Numbers starting with these first six digits were originally assigned to the Ronkonkoma exchange.
631-202Onvoy (Sinch)631-285Verizon631-389Paetec Itel631-428T-Mobile631-467Verizon631-468Verizon631-471Verizon631-542Telengy L.L.C.631-580Verizon631-585Verizon631-588Verizon631-590Lumen (Level 3)631-615Lumen (Level 3)631-619Tc Systems631-648Cablevision Lightpath631-676Csc Voice631-710Cablevision Lightpath631-718Metropcs631-737Verizon631-738Verizon631-739Verizon Business (MCImetro)631-820Verizon Business (MCImetro)631-913Verizon Business (MCImetro)631-981Verizon934-246T-Mobile934-255T-Mobile934-263Ton80 Communications934-949Onvoy (Sinch)
Nearby cities in area code 631
- West Babylon
- Coram
- Central Islip
- Commack
- Huntington Station
- Centereach
- Bay Shore
- Shirley
- Deer Park
- Lindenhurst
- West Islip
- Medford
Questions
- What is the area code for Holbrook, NY?
- Holbrook uses 2 area codes: 631 and 934. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Holbrook in?
- Holbrook is in the Eastern time zone.