.sky SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	41ms	91ms	504
7d	100%	100%	31ms	128ms	2880
30d	100%	100%	31ms	380ms	15984

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	296ms	406ms	80
7d	100%	100%	299ms	487ms	480
30d	100%	99.96%	307ms	473ms	2632

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%	44ms	103ms	66
7d	100%	37ms	107ms	360
30d	99.75%	38ms	128ms	1974

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	12ms	38 minutes ago	local	NSID: u-ci-nominet2.cator1.	OK
`DNS`	v6	1.6ms	55 days, 4 hours ago	local	NSID: u-ci-nominet2.uschi1.	OK
`DNSSEC`	v4	38ms	8 minutes ago	local	Key: 27464	OK
`DNSSEC`	v6	101ms	8 minutes ago	local	Key: 27464	OK
`RDAP`	v4	369ms	6 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	278ms	6 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

278ms total

DNS Lookup

—

TCP Connect

85ms

TLS Handshake

95ms

Time to First Byte

278ms

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