.windows SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	27ms	86ms	704
7d	100%	100%	29ms	102ms	3760
30d	100%	100%	26ms	300ms	21184

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	302ms	467ms	64
7d	100%	100%	317ms	511ms	264
30d	98.93%	98.81%	410ms	646ms	1680

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%	37ms	102ms	88
7d	100%	37ms	102ms	476
30d	100%	38ms	110ms	2684

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	3.5ms	20 minutes ago	local	NSID: u-ci-nominet1.uschi1.	OK
`DNS`	v6	1.3ms	20 minutes ago	local	NSID: u-ci-nominet2.uschi1.	OK
`DNSSEC`	v4	39ms	28 minutes ago	local	Key: 31600	OK
`DNSSEC`	v6	103ms	28 minutes ago	local	Key: 31600	OK
`RDAP`	v4	381ms	24 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	282ms	24 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

282ms total

DNS Lookup

—

TCP Connect

86ms

TLS Handshake

96ms

Time to First Byte

281ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

16 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`dns1.nic.windows`	`213.248.219.133`	v4	—	—
`dns1.nic.windows`	`2a01:618:403::133`	v6	—	—
`dns2.nic.windows`	`103.49.83.133`	v4	—	—
`dns2.nic.windows`	`2401:fd80:403::133`	v6	—	—
`dns3.nic.windows`	`213.248.223.133`	v4	—	—
`dns3.nic.windows`	`2a01:618:407::133`	v6	—	—
`dns4.nic.windows`	`43.230.51.133`	v4	—	—
`dns4.nic.windows`	`2401:fd80:407::133`	v6	—	—
`dnsa.nic.windows`	`156.154.100.3`	v4	AS12008
`dnsa.nic.windows`	`2001:502:ad09::3`	v6	—	—
`dnsb.nic.windows`	`156.154.101.3`	v4	AS12008
`dnsb.nic.windows`	`2001:502:2eda::3`	v6	—	—
`dnsc.nic.windows`	`156.154.102.3`	v4	AS12008
`dnsc.nic.windows`	`2610:a1:1009::3`	v6	—	—
`dnsd.nic.windows`	`156.154.103.3`	v4	AS12008
`dnsd.nic.windows`	`2610:a1:1010::3`	v6	—	—

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

Test With Your Computer

DNS

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

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

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .windows

Operator Microsoft Corporation

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

Quick Start

GET /any53/api/v1/compliance/windows/

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

Example Response

{
  "tld": "windows",
  "display_name": ".windows",
  "operator": "Microsoft Corporation",
  "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/windows/"
  },
  "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