.cern SLA Compliance

TLD SLA Compliance Metrics

Spec 10

No metrics available yet

Metrics will appear after probes start reporting data. Check back in about an hour.

Current Check Status

Reported by Any53 Probes

Type	AF	RTT	Last Check	Source	Details	Status
`DNS`	v4	123ms	33 days, 14 hours ago	local	NSID: app5.nrt1.hosts.meta.re…	OK
`DNSSEC`	v4	122ms	33 days, 15 hours ago	local	—	FAIL
`DNSSEC`	v6	133ms	33 days, 15 hours ago	local	—	FAIL
`RDAP`	v4	94ms	33 days, 15 hours ago	local	TLS 1.3	OK
`RDAP`	v6	96ms	33 days, 15 hours ago	local	TLS 1.3	OK

RDAP HTTPS Timing

96ms total

DNS Lookup

0.36ms

TCP Connect

2.2ms

TLS Handshake

13ms

Time to First Byte

96ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

4 IPs tested

Hostname	IP Address	AF	ASN
`a0.nic.cern`	`65.22.224.1`	v4	AS12041
`a2.nic.cern`	`65.22.227.1`	v4	AS207266
`b0.nic.cern`	`65.22.225.1`	v4	AS12041
`c0.nic.cern`	`65.22.226.1`	v4	AS12041

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

Test With Your Computer

DNS

dig @a0.nic.cern cern. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D cern. SOA @a0.nic.cern Alternative using drill with DNSSEC trace

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .cern

Operator European Organization for Nuclear Research ("CERN")

RDAP Server https://rdap.identitydigital.services/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 .cern compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/cern/

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

Example Response

{
  "tld": "cern",
  "display_name": ".cern",
  "operator": "European Organization for Nuclear Research ("CERN")",
  "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.identitydigital.services/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