.call

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 28ms 86ms 528
7d 99.58% 99.58% 29ms 115ms 2832
30d 99.93% 99.93% 28ms 265ms 16048

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 293ms 480ms 72
7d 100% 100% 308ms 509ms 360
30d 100% 99.90% 321ms 516ms 2016

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% 37ms 103ms 44
7d 99.58% 38ms 187ms 236
30d 99.77% 45ms 140ms 1312

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 1.2ms 5 minutes ago local NSID: u-ci-nominet1.uschi1. OK
DNS v6 1.3ms 105 days, 7 hours ago local NSID: u-ci-nominet2.uschi1. OK
DNSSEC v4 38ms 1 hour, 12 minutes ago local Key: 58357 OK
DNSSEC v6 102ms 1 hour, 12 minutes ago local Key: 58357 OK
RDAP v4 285ms 1 hour, 20 minutes ago local TLS 1.3 OK
RDAP v6 280ms 1 hour, 20 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

280ms total
DNS Lookup
—
TCP Connect
85ms
TLS Handshake
94ms
Time to First Byte
280ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

8 IPs tested
Hostname IP Address AF ASN RPKI Status
dns1.nic.call 213.248.218.63 v4 — —
dns2.nic.call 103.49.82.63 v4 — —
dns3.nic.call 213.248.222.63 v4 — —
dns4.nic.call 43.230.50.63 v4 — —
dnsa.nic.call 156.154.100.3 v4 AS12008
dnsb.nic.call 156.154.101.3 v4 AS12008
dnsc.nic.call 156.154.102.3 v4 AS12008
dnsd.nic.call 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.call call. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D call. SOA @dns1.nic.call Alternative using drill with DNSSEC trace

RDAP

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

Registry Information

Active
TLD .call
Operator Amazon Registry Services, Inc.
RDAP Server https://rdap.nominet.uk/call/ 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 .call compliance metrics programmatically via our REST API.

Quick Start

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

Example Response

{
  "tld": "call",
  "display_name": ".call",
  "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/call/"
  },
  "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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