.best

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 30ms 42ms 132
7d 93.28% 93.28% 28ms 54ms 716
30d 98.66% 98.66% 35ms 169ms 4020

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 408ms 478ms 20
7d 93.33% 93.33% 382ms 446ms 120
30d 98.81% 98.81% 411ms 475ms 672

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 Status
24h 100% 60ms 78ms 22
7d 97.37% 59ms 244ms 114
30d 98.80% 97ms 156ms 666

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 TSLAC
DNS v4 19ms 49 minutes ago local NSID: WVQS-AQ5DSO-L6ZRS7 OK
DNS v6 18ms 205 days, 11 hours ago local NSID: WVQS-AQ5DSO-L6ZRS7 OK
DNSSEC v4 60ms 1 hour, 18 minutes ago local Key: 13966 OK
DNSSEC v6 78ms 1 hour, 18 minutes ago local Key: 13966 OK
RDAP v4 405ms 3 hours, 48 minutes ago local TLS 1.2 OK
RDAP v6 392ms 3 hours, 48 minutes ago local TLS 1.2 OK

RDAP HTTPS Timing

392ms total
DNS Lookup
0.35ms
TCP Connect
95ms
TLS Handshake
193ms
Time to First Byte
391ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

4 IPs tested
Hostname IP Address AF ASN RPKI Status
a.nic.best 194.169.218.109 v4 — —
b.nic.best 185.24.64.109 v4 — —
c.nic.best 212.18.248.109 v4 — —
d.nic.best 212.18.249.109 v4 — —

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

Test With Your Computer

DNS

dig @a.nic.best best. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D best. SOA @a.nic.best Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.centralnic.com/best/domain/nic.best" | jq . Fetch RDAP JSON (positive lookup)
curl -I -sS "https://rdap.centralnic.com/best/domain/nic.best" Headers only (check TLS, timing)
Open in Browser View RDAP response directly

Registry Information

Active
TLD .best
Operator BestTLD Pty Ltd
RDAP Server https://rdap.centralnic.com/best/ 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 .best compliance metrics programmatically via our REST API.

Quick Start

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

Example Response

{
  "tld": "best",
  "display_name": ".best",
  "operator": "BestTLD Pty Ltd",
  "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.centralnic.com/best/"
  },
  "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

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