NG112 reference

Dns Service Discovery

Structured NG112 reference page.

112 readiness

Policy, location, routing, and response quality connected in one operational model.

Core NG112 Architecture

DNS and Service Discovery

Emergency services depend on naming and discovery just like other IP services, but failure consequences are different. DNS design must account for resilience, split-horizon behavior, certificate names, disaster recovery and operational change control.

Emergency function name

DNS/service discovery

Reachable routing target

Session delivery

What it does

DNS and service discovery support reliable discovery of emergency services, routing elements and dependent network functions where architectures use them.

Naming and discovery glue together SIP routing, secure interconnect and service reachability.

How it works

Resolves service names or routing targets used by emergency systems.
Supports redundant endpoints and regional failover.
Aligns certificate identity with actual service names.

Key interfaces and protocols

DNS
NAPTR/SRV concepts where used
TLS certificate validation
Operational monitoring

Systems it interacts with

ESRP
BCF
ESInet
PSAP edge
Monitoring

Common failure modes

Stale records after failover
Certificate name mismatch
Resolver isolation
Untracked dependency on public DNS

Implementation considerations

Document authoritative DNS ownership.
Test resolver behavior during regional outage.
Avoid hidden single points of failure in naming.

Standards

IETF DNS and SIP service discovery practices
ETSI architecture references

Related NG112 technologies

ESInet BCF Resilience TLS for Emergency Signaling Failover and Alternate Routing

Related country deployments

No country deployments are listed here until independently verified against official or high-confidence sources.

NG112 Checklists

Sources

112: the European emergency number - European Commission, accessed 2026-08-31
Directive (EU) 2018/1972 establishing the European Electronic Communications Code - European Union, accessed 2026-08-31
Emergency communications - BEREC, accessed 2026-08-31
Next Generation 112 and the new Emergency Services Networks Landscape - EENA, accessed 2026-08-31
ETSI TS 103 479 deliverable directory - ETSI, accessed 2026-08-31

Last verified: 2026-08-31