.sky SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	28ms	86ms	528
7d	100%	100%	29ms	89ms	2840
30d	100%	100%	28ms	111ms	16000

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	308ms	418ms	80
7d	100%	100%	298ms	422ms	480
30d	99.85%	99.81%	300ms	482ms	2636

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	100%	38ms	102ms	66
7d	100%	38ms	102ms	348
30d	99.84%	43ms	118ms	1926

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	1.2ms	32 minutes ago	local	NSID: u-ci-nominet2.uschi1.	OK
`DNS`	v6	1.6ms	103 days, 13 hours ago	local	NSID: u-ci-nominet2.uschi1.	OK
`DNSSEC`	v4	38ms	1 hour, 2 minutes ago	local	Key: 27464	OK
`DNSSEC`	v6	102ms	1 hour, 2 minutes ago	local	Key: 27464	OK
`RDAP`	v4	371ms	1 hour ago	local	TLS 1.3	OK
`RDAP`	v6	290ms	1 hour ago	local	TLS 1.3	OK

RDAP HTTPS Timing

290ms total

DNS Lookup

—

TCP Connect

85ms

TLS Handshake

102ms

Time to First Byte

290ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`dns1.nic.sky`	`213.248.219.127`	v4	—	—
`dns2.nic.sky`	`103.49.83.127`	v4	—	—
`dns3.nic.sky`	`213.248.223.127`	v4	—	—
`dns4.nic.sky`	`43.230.51.127`	v4	—	—
`dnsa.nic.sky`	`156.154.100.3`	v4	AS12008
`dnsb.nic.sky`	`156.154.101.3`	v4	AS12008
`dnsc.nic.sky`	`156.154.102.3`	v4	AS12008
`dnsd.nic.sky`	`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.sky sky. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

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

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .sky

Operator Sky UK Limited

RDAP Server https://rdap.nominet.uk/sky/ 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 .sky compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/sky/

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

Example Response

{
  "tld": "sky",
  "display_name": ".sky",
  "operator": "Sky UK Limited",
  "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/sky/"
  },
  "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