.arpa SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	30ms	242ms	168
7d	99.19%	99.19%	16ms	240ms	2952
30d	90.00%	90.00%	16ms	240ms	3956

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%	36ms	36ms	2
7d	100%	36ms	36ms	76
30d	100%	36ms	36ms	134

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	48ms	2 hours, 13 minutes ago	local	NSID: M-SFO-1	OK
`DNS`	v6	46ms	2 hours, 13 minutes ago	local	NSID: M-SFO-4	OK
`DNSSEC`	v4	36ms	33 minutes ago	local	Key: 42581	OK
`DNSSEC`	v6	36ms	33 minutes ago	local	Key: 42581	OK

Nameservers

24 IPs tested

Hostname	IP Address	AF
`a.ns.arpa`	`198.41.0.4`	v4
`a.ns.arpa`	`2001:503:ba3e::2:30`	v6
`b.ns.arpa`	`170.247.170.2`	v4
`b.ns.arpa`	`2801:1b8:10::b`	v6
`c.ns.arpa`	`192.33.4.12`	v4
`c.ns.arpa`	`2001:500:2::c`	v6
`d.ns.arpa`	`199.7.91.13`	v4
`d.ns.arpa`	`2001:500:2d::d`	v6
`e.ns.arpa`	`192.203.230.10`	v4
`e.ns.arpa`	`2001:500:a8::e`	v6
`f.ns.arpa`	`192.5.5.241`	v4
`f.ns.arpa`	`2001:500:2f::f`	v6
`g.ns.arpa`	`192.112.36.4`	v4
`g.ns.arpa`	`2001:500:12::d0d`	v6
`h.ns.arpa`	`198.97.190.53`	v4
`h.ns.arpa`	`2001:500:1::53`	v6
`i.ns.arpa`	`192.36.148.17`	v4
`i.ns.arpa`	`2001:7fe::53`	v6
`k.ns.arpa`	`193.0.14.129`	v4
`k.ns.arpa`	`2001:7fd::1`	v6
`l.ns.arpa`	`199.7.83.42`	v4
`l.ns.arpa`	`2001:500:9f::42`	v6
`m.ns.arpa`	`202.12.27.33`	v4
`m.ns.arpa`	`2001:dc3::35`	v6

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

Test With Your Computer

DNS

dig @a.ns.arpa arpa. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D arpa. SOA @a.ns.arpa Alternative using drill with DNSSEC trace

Registry Information

Active

TLD .arpa

Operator IANA

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).

API Access

JSON API

Access .arpa compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/arpa/

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

Example Response

{
  "tld": "arpa",
  "display_name": ".arpa",
  "operator": "IANA",
  "updated_at": "2026-01-31T12:00:00Z",
  "dns": {
    "availability_24h": 99.99,
    "rtt_p50_ms": 12,
    "rtt_p95_ms": 42,
    "sla_threshold_ms": 500
  },
  "servers": {
    "whois_host": "whois.iana.org"
  },
  "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