.best SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	26ms	37ms	72
7d	100%	100%	26ms	44ms	1392
30d	94.35%	94.35%	24ms	44ms	1900

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	402ms	432ms	12
7d	100%	100%	400ms	423ms	220
30d	100%	100%	403ms	433ms	308

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%	53ms	55ms	6
7d	100%	53ms	55ms	126
30d	100%	49ms	51ms	206

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	18ms	29 minutes ago	local	NSID: WVQS-AQ5DSO-L6ZRS7	OK
`DNS`	v6	18ms	29 minutes ago	local	NSID: WVQS-AQ5DSO-L6ZRS7	OK
`DNSSEC`	v4	55ms	1 hour, 33 minutes ago	local	Key: 13966	OK
`DNSSEC`	v6	54ms	1 hour, 33 minutes ago	local	Key: 13966	OK
`RDAP`	v4	409ms	1 hour, 26 minutes ago	local	TLS 1.2	OK
`RDAP`	v6	396ms	1 hour, 26 minutes ago	local	TLS 1.2	OK

RDAP HTTPS Timing

396ms total

DNS Lookup

—

TCP Connect

94ms

TLS Handshake

192ms

Time to First Byte

396ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

8 IPs tested

Hostname	IP Address	AF
`a.nic.best`	`194.169.218.109`	v4
`a.nic.best`	`2001:67c:13cc::1:109`	v6
`b.nic.best`	`185.24.64.109`	v4
`b.nic.best`	`2a04:2b00:13cc::1:109`	v6
`c.nic.best`	`212.18.248.109`	v4
`c.nic.best`	`2a04:2b00:13ee::109`	v6
`d.nic.best`	`212.18.249.109`	v4
`d.nic.best`	`2a04:2b00:13ff::109`	v6

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