Zero-rating of Data

Guidelines

Last updated: 16 June 2022

The U.K. Communications Regulator, Ofcom published on 22 June 2021, new Emergency Video Relay General Conditions. Condition C5 stated that Regulated Providers must:

C5.12 

(a) provide the Emergency Video Relay Service free of charge to the End-User; 

(b) where technically feasible, apply an incremental price of zero to any data traffic associated with the use of the Emergency Video Relay Service;

Sign Language Interactions (SLI) is an approved Emergency Video Relay service provider and will provide access to this service via dedicated 999 BSL apps and via a dedicated 999 BSL website.

Below is a summary of information required to enable communication providers to achieve zero-rating:

1. IP Addresses

The following static IP addresses & port ranges are used exclusively for video calls made by BSL users to this emergency video relay service:

IP Exclusive to application? Protocol Port(s)
46.249.223.171 Yes TCP, UDP 443, 5061
35.176.195.41 Yes TCP 443
35.176.195.41 Yes UDP 40000-40999
13.41.36.107 Yes TCP 443
13.41.36.107 Yes UDP 40000-40999
18.168.126.210 Yes UDP 10000-20000
18.192.21.131 Yes TCP 443
46.249.223.174 Yes TCP, UDP 443, 5061
35.177.226.133 Yes TCP 443
35.177.226.133 Yes UDP 40000-40999
13.41.28.115 Yes UDP 10000-20000
68.66.243.240* Yes TCP 80, 443
34.250.136.49* Yes* TCP* 8088
54.75.128.245* Yes* TCP* 8088*
18.169.48.62* Yes* TCP* 8088*
3.10.92.144* Yes* TCP* 8088*
13.248.173.208* Yes* UDP* 53*
76.223.54.68* Yes* UDP* 53*
75.2.38.244* Yes* TCP* 8088*
99.83.168.84* Yes* TCP* 8088*
*added/amended

2. HTTPS Hostname

The following websites are used exclusively for this service (note that * denotes wildcard):

Hostname match Content types Exclusive to application? Protocol Port(s)
*.999bsl.co.uk Text, images, videos Yes TCP 80,443
999bsl.co.uk Text, images, videos Yes TCP 80,443
*.999bsl.uk WebRTC, RTP, images & text Yes TCP, UDP 443 (TCP) 40000-40999 (UDP)
999bsl.uk WebRTC, RTP, images & text Yes TCP, UDP 443 (TCP) 40000-40999 (UDP)
*.999bsl.com Redirected to 999bsl.co.uk Yes TCP 80,443
999bsl.com Redirected to 999bsl.co.uk Yes TCP 80,443
*.999bsl.org.uk Redirected to 999bsl.co.uk Yes TCP 80,443
999bsl.org.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.999bsl.me Redirected to 999bsl.co.uk Yes TCP 80,443
999bsl.me Redirected to 999bsl.co.uk Yes TCP 80,443
*.999bsl.net Redirected to 999bsl.co.uk Yes TCP 80,443
999bsl.net Redirected to 999bsl.co.uk Yes TCP 80,443
*.999bsl.org Redirected to 999bsl.co.uk Yes TCP 80,443
999bsl.org Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.org.uk Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.org.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.me Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.me Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.net Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.net Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.org Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.org Redirected to 999bsl.co.uk Yes TCP 80,443
*.bsl999.uk Redirected to 999bsl.co.uk Yes TCP 80,443
bsl999.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs999.com Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs999.com Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs999.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs999.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs999.uk Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs999.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs.com Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs.com Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs.co.uk Redirected to 999bsl.co.uk Yes TCP 80,443
*.emergencyvrs.uk Redirected to 999bsl.co.uk Yes TCP 80,443
emergencyvrs.uk Redirected to 999bsl.co.uk Yes TCP 80,443

Communication providers should apply both IP and hostname rules to cover all app and website traffic.

For guidance on requirements when users are either suspended/restricted/disconnected by their communication provider, or who are on a Pay-As-You-Go tariff, but have zero credit, or in a public Wi-fi zone that requires registration (e.g. on a train or in a hotel) please refer to the Frequently Asked Questions on the Ofcom website.

If you have any questions or feedback regarding these instructions, please email us at info@999bsl.co.uk