.cymru

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 28ms 89ms 352
7d 100% 100% 29ms 113ms 1888
30d 99.93% 99.93% 28ms 220ms 10696

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 347ms 433ms 60
7d 100% 99.70% 321ms 644ms 336
30d 99.58% 99.48% 361ms 532ms 1916

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 Status
24h 100% 37ms 102ms 44
7d 100% 37ms 102ms 232
30d 100% 38ms 110ms 1314

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 TSLAC
DNS v4 1.5ms 31 minutes ago local NSID: u-ci-nominet2.uschi1. OK
DNS v6 1.4ms 105 days, 13 hours ago local NSID: u-ci-nominet1.uschi1. OK
DNSSEC v4 38ms 29 minutes ago local Key: 34255 OK
DNSSEC v6 103ms 29 minutes ago local Key: 34255 OK
RDAP v4 279ms 1 hour, 9 minutes ago local TLS 1.3 OK
RDAP v6 473ms 1 hour, 9 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

473ms total
DNS Lookup
181ms
TCP Connect
85ms
TLS Handshake
106ms
Time to First Byte
473ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested
Hostname IP Address AF ASN RPKI Status
dns1.nic.cymru 213.248.219.3 v4 — —
dns2.nic.cymru 103.49.83.3 v4 — —
dns3.nic.cymru 213.248.223.3 v4 — —
dns4.nic.cymru 43.230.51.3 v4 — —
dnsa.nic.cymru 156.154.100.3 v4 AS12008
dnsb.nic.cymru 156.154.101.3 v4 AS12008
dnsc.nic.cymru 156.154.102.3 v4 AS12008
dnsd.nic.cymru 156.154.103.3 v4 AS12008

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

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