.cymru SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	19ms	92ms	64
7d	100%	100%	19ms	139ms	1280
30d	87.39%	87.39%	19ms	142ms	1694

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	278ms	359ms	4
7d	100%	98.86%	287ms	608ms	88
30d	99.34%	98.68%	291ms	697ms	152

DNSSEC Validation Metrics

Registry Agreement Spec 6

DNSSEC is required by the Registry Agreement (Specification 6) but is not part of the Spec 10 SLA. We monitor DNSSEC validation independently.

Period	Validation Rate	RTT p50	RTT p95	Checks
24h	No data available
7d	100%	38ms	108ms	66
30d	99.09%	38ms	160ms	110

Unlike Spec 10 services, DNSSEC has no formal availability SLA. Thresholds shown are operational guidelines.

Current Check Status

Reported by Any53 Probes

Type	AF	RTT	Last Check	Source	Details	Status
`DNS`	v4	1.4ms	1 hour, 32 minutes ago	local	NSID: u-ci-nominet2.uschi1.	OK
`DNS`	v6	1.3ms	1 hour, 32 minutes ago	local	NSID: u-ci-nominet1.uschi1.	OK
`DNSSEC`	v4	38ms	1 hour, 15 minutes ago	local	Key: 34255	OK
`DNSSEC`	v6	102ms	1 hour, 15 minutes ago	local	Key: 34255	OK
`RDAP`	v4	285ms	3 hours, 55 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	279ms	3 hours, 55 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

279ms total

DNS Lookup

—

TCP Connect

84ms

TLS Handshake

95ms

Time to First Byte

278ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

16 IPs tested

Hostname	IP Address	AF
`dns1.nic.cymru`	`213.248.219.3`	v4
`dns1.nic.cymru`	`2a01:618:403::3`	v6
`dns2.nic.cymru`	`103.49.83.3`	v4
`dns2.nic.cymru`	`2401:fd80:403::3`	v6
`dns3.nic.cymru`	`213.248.223.3`	v4
`dns3.nic.cymru`	`2a01:618:407::3`	v6
`dns4.nic.cymru`	`43.230.51.3`	v4
`dns4.nic.cymru`	`2401:fd80:407::3`	v6
`dnsa.nic.cymru`	`156.154.100.3`	v4
`dnsa.nic.cymru`	`2001:502:ad09::3`	v6
`dnsb.nic.cymru`	`156.154.101.3`	v4
`dnsb.nic.cymru`	`2001:502:2eda::3`	v6
`dnsc.nic.cymru`	`156.154.102.3`	v4
`dnsc.nic.cymru`	`2610:a1:1009::3`	v6
`dnsd.nic.cymru`	`156.154.103.3`	v4
`dnsd.nic.cymru`	`2610:a1:1010::3`	v6

Per ICANN Spec 10, we test all delegated nameserver IPs independently.

Test With Your Computer

DNS

dig @dns1.nic.cymru cymru. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D cymru. SOA @dns1.nic.cymru Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.nominet.uk/cymru/domain/nic.cymru" | jq . Fetch RDAP JSON (positive lookup)

curl -I -sS "https://rdap.nominet.uk/cymru/domain/nic.cymru" Headers only (check TLS, timing)

Open in Browser View RDAP response directly

Registry Information

Active

TLD .cymru

Operator Nominet UK

RDAP Server https://rdap.nominet.uk/cymru/ RDAP Client

ICANN SLA Requirements

Per ICANN Registry Agreement Specification 10:

DNS SLA UDP RTT ≤ 500ms for 95% of queries. Availability: 99% (max 432 min/month downtime).

RDAP SLA RTT ≤ 4000ms for 95% of queries. Availability: 98% (max 864 min/month downtime).

API Access

JSON API

Access .cymru compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/cymru/

curl -H "X-API-Key: ${YOUR_API_KEY}" \
  "https://www.any53.com/any53/api/v1/compliance/cymru/"

Example Response

{
  "tld": "cymru",
  "display_name": ".cymru",
  "operator": "Nominet UK",
  "updated_at": "2026-01-31T12:00:00Z",
  "dns": {
    "availability_24h": 99.99,
    "rtt_p50_ms": 12,
    "rtt_p95_ms": 42,
    "sla_threshold_ms": 500
  },
  "rdds": {
    "protocol": "RDAP",
    "availability_24h": 99.95,
    "rtt_p50_ms": 180,
    "rtt_p95_ms": 412,
    "sla_threshold_ms": 4000
  },
  "servers": {
    "rdap_url": "https://rdap.nominet.uk/cymru/"
  },
  "spec10_compliant": true
}

Generate API Key

Get a free API key to start making requests. Provide an email to upgrade to the verified tier (600 requests/hour).

Endpoints

Endpoint	Description	Tier
`GET /compliance/`	List all monitored TLDs	All
`GET /compliance/{tld}/`	Current metrics for a TLD	All
`GET /compliance/{tld}/history/`	Historical time-series data	Organization
`GET /compliance/{tld}/probes/`	Per-probe breakdown	Organization
`POST /compliance/keys/`	Generate a new API key	No auth

Rate Limits

Tier	Rate Limit	Features
Anonymous	100/hour	Current snapshot, hourly aggregates
Verified	600/hour	Current snapshot, hourly aggregates
Organization	6000/hour	Historical data, per-minute resolution, per-probe breakdown