.circle SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	39ms	123ms	448
7d	100%	100%	31ms	125ms	2624
30d	99.77%	99.77%	31ms	824ms	14424

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	351ms	447ms	60
7d	100%	100%	332ms	453ms	360
30d	99.70%	99.65%	341ms	486ms	2004

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	105ms	40
7d	100%	37ms	104ms	240
30d	99.55%	38ms	137ms	1336

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	12ms	24 minutes ago	local	NSID: u-ci-nominet1.cator1.	OK
`DNS`	v6	1.3ms	56 days, 22 hours ago	local	NSID: u-ci-nominet1.uschi1.	OK
`DNSSEC`	v4	38ms	7 seconds ago	local	Key: 37745	OK
`DNSSEC`	v6	101ms	7 seconds ago	local	Key: 37745	OK
`RDAP`	v4	381ms	1 hour, 19 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	274ms	1 hour, 18 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

274ms total

DNS Lookup

—

TCP Connect

85ms

TLS Handshake

94ms

Time to First Byte

273ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`dns1.nic.circle`	`213.248.218.64`	v4	—	—
`dns2.nic.circle`	`103.49.82.64`	v4	—	—
`dns3.nic.circle`	`213.248.222.64`	v4	—	—
`dns4.nic.circle`	`43.230.50.64`	v4	—	—
`dnsa.nic.circle`	`156.154.100.3`	v4	AS12008
`dnsb.nic.circle`	`156.154.101.3`	v4	AS12008
`dnsc.nic.circle`	`156.154.102.3`	v4	AS12008
`dnsd.nic.circle`	`156.154.103.3`	v4	AS12008

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

Test With Your Computer

DNS

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

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

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .circle

Operator Amazon Registry Services, Inc.

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

Quick Start

GET /any53/api/v1/compliance/circle/

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

Example Response

{
  "tld": "circle",
  "display_name": ".circle",
  "operator": "Amazon Registry Services, Inc.",
  "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/circle/"
  },
  "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