SIP trunk
Route calls into your existing PBX, 3CX, FreeSWITCH, Teams SBC or other SIP platform.
- Registration or IP routing details
- Starter, Regular and Plus concurrency tiers
- Fixed inbound and outbound call limits
UK BUSINESS NUMBERS · INSTANT ONLINE ORDERING
Your UK business number, connected your way
Choose a memorable UK number and connect it to your SIP trunk, a ready-to-use SIP phone, or your existing landline or mobile.
Reserved while you checkoutUK supportSecure card payment
YOUR NEW NUMBER020 3988 1234London
SIPYour PBX
IPSIP phone
↗Mobile divert
01 & 02 geographic03 UK-wide0800 freephoneNumber portingSIP-ready delivery
CHOOSE THE DELIVERY
One number. Three simple ways to answer.
Start with the service that fits today, then move to a different routing method as your business grows.
Hosted SIP phone
Get a hosted extension and select a compatible desk or cordless SIP phone during checkout.
- Ready for office or home working
- Professional outbound caller ID
- Optional preconfigured handset
Landline or mobile divert
Forward every call to a UK number you already use—no new equipment or app required.
- Fastest route to get started
- Change destination through support
- Ideal for sole traders and campaigns
LIVE INVENTORY
View all numbers →Featured numbers available now
029 2255 5555
Cardiff
from £2.50/month + VAT
029 2111 1111
Cardiff
from £2.50/month + VAT
028 8788 8888
Antrim
from £2.50/month + VAT
028 8688 8888
Antrim
from £2.50/month + VAT
028 7111 1111
Antrim
from £2.50/month + VAT
028 7022 2222
Antrim
from £2.50/month + VAT
LOCAL PRESENCE
Popular UK area codes
Build a local presence with a geographic number while receiving calls wherever your team works.
Browse local numbersUK-WIDE SALES NETWORK
Represent UKDDI in your local area
Introduce businesses to local phone numbers, SIP trunks, hosted VoIP, cloud voice and mobile-divert services, backed by the wider 39T agent programme.
LOCAL TERRITORIESUK-wide
Build relationships in an area you know, with recurring telecom services and technical support behind you.
READY TO CONNECT?
Find my UK numberChoose a number in minutes.
Your chosen number is held while you configure the service and complete payment.