Developing interoperability standards for the UK

NICC Standards Limited is a technical forum for the UK communications sector that develops interoperability standards for public communications networks and services in the UK.  It is an independent organisation owned and run by its members.

It is now necessary to be a member to participate in NICC activities.  Learn more about NICC membership.

The NICC members’ site [login required] contains information about forthcoming meetings, working and draft documentation.

NICC is a trade mark of NICC Standards Ltd.



The 2021 NICC Open Forum is scheduled for the 16th November 2021.

Further information on the 2021 NICC Open Forum will be available after July 2021.

Latest news

NICC Open Forum and AGM 2019
The presentations from the event are now available.

New NICC standards are now available on the ‘Publications’ page;

ND1443V1.1.1 Guidelines for the Security of All IP Telephony (All IPT) Service in the UK Telecommunications Network

The following NDs relating to the Common Number Database have been removed from the public site – ND1022, ND1023, ND1024, ND1415, ND1512 and ND1631.


NICC current work

NICC specifications are being developed for the following technical activities and interfaces:

  • IP Routeing for ported number
  • ALL IP end to end
  • Blockchain (DLT) for Number Porting and Management
  • Nuisance Calls and CLI
  • Interworking UK ISUP to SIP
  • IP access to Emergency Services
  • SIP Overload Control

These and more current work areas are detailed here.