.is SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	108ms	256ms	104
7d	100%	100%	82ms	263ms	600
30d	100%	100%	107ms	1133ms	2028

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	424ms	518ms	20
7d	100%	100%	423ms	547ms	120
30d	100%	99.75%	423ms	582ms	404

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%	254ms	269ms	22
7d	100%	254ms	269ms	120
30d	99.75%	254ms	296ms	406

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	2.0ms	8 minutes ago	local	NSID: 746c642d616c6c2d6368693…	OK
`DNS`	v6	826ms	154 days, 4 hours ago	local	—	FAIL
`DNSSEC`	v4	269ms	29 minutes ago	local	Key: 46824	OK
`DNSSEC`	v6	254ms	29 minutes ago	local	Key: 46824	OK
`RDAP`	v4	437ms	3 hours, 19 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	415ms	3 hours, 19 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

415ms total

DNS Lookup

—

TCP Connect

118ms

TLS Handshake

122ms

Time to First Byte

415ms

TLS 1.3 / TLS_AES_256_GCM_SHA384

Nameservers

4 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`a.nic.is`	`185.93.156.10`	v4	—	—
`c.nic.is`	`204.61.216.116`	v4	—	—
`d.nic.is`	`194.146.106.58`	v4	—	—
`e.nic.is`	`194.0.25.41`	v4	—	—

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

Test With Your Computer

DNS

dig @a.nic.is is. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D is. SOA @a.nic.is Alternative using drill with DNSSEC trace

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .is

Operator Iceland

RDAP Server https://rdap.isnic.is/rdap/ 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 .is compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/is/

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

Example Response

{
  "tld": "is",
  "display_name": ".is",
  "operator": "Iceland",
  "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.isnic.is/rdap/"
  },
  "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