- Advisory services
- Consultations
- Network and technology policies
- Network and technology service docs
- Using Jisc community
- Network and technology service docs
- Domain name registration
- How to sign up
- Janet Support Manual
- Janet CSIRT
- Back-up services
- eduroam
- Backup Web Hosting
- Certificate Service
- Connection timeline
- Eligibility
- Janet 3G Buyer's Guide
- Janet 3G eduroam interoperablity authentication methods
- Janet Mail Services
- Janet Network Charges
- Janet Reach
- Janet Videoconferencing Feedback results
- Primary connections
- Supporting Business Continuity
- Business and Community Engagement (BCE) using Janet
- Cost
- Interconnect connections
- Connecting student accommodation
- Customer-owned routing equipment
- Obtaining a Janet IP Address Range
- Terms for the Provision of the Janet Service
- Upgrading your existing bandwidth and Janet router
- Fault reporting
- IP address assignment
- Janet Aurora
- Janet Netsight
- Janet txt
- Routers
- Network set-up
- Guest access
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- Contact
- Primary Nameserver Service
- Secondary Nameserver Service
- Vscene
- Domain name registration
- Contact
- Register ac.uk
- Register gov.uk
- Register gov.scot
- Cofrestru llyw.cymru neu gov.wales
- Register gov.wales or llyw.cymru
- Modify DNS entries
- Reverse delegations
- Register nen.gov.uk
- Register URN
- Renewals
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- Registrar Membership
- WHOIS
- DNS FAQs
- DNS Portal Help Page
- Data protection
- Reverse delegations
- Reverse delegation form
- Example reverse delegation forms
Reverse delegations

Reverse DNS delegations allow applications to map to a domain name from an IP address. Reverse delegation is achieved by use of the special domain names in-addr.arpa (IPv4) and ip6.arpa (IPv6).