.phd SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	46ms	114ms	105
7d	100%	100%	45ms	106ms	600
30d	100%	100%	44ms	124ms	2030

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	70ms	159ms	20
7d	100%	99.17%	74ms	478ms	120
30d	100%	99.75%	70ms	247ms	404

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%	62ms	62ms	22
7d	98.33%	311ms	312ms	120
30d	99.51%	127ms	127ms	408

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	34ms	39 minutes ago	local	NSID: 80fcc485f032ec6fd128e93…	OK
`DNS`	v6	11ms	158 days, 17 hours ago	local	—	OK
`DNSSEC`	v4	64ms	46 minutes ago	local	Key: 38734	OK
`DNSSEC`	v6	62ms	46 minutes ago	local	Key: 38734	OK
`RDAP`	v4	80ms	3 hours, 55 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	90ms	3 hours, 55 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

90ms total

DNS Lookup

—

TCP Connect

11ms

TLS Handshake

24ms

Time to First Byte

89ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

5 IPs tested

Hostname	IP Address	AF	ASN
`ns-tld1.charlestonroadregistry.com`	`216.239.32.105`	v4	AS15169
`ns-tld2.charlestonroadregistry.com`	`216.239.34.105`	v4	AS15169
`ns-tld3.charlestonroadregistry.com`	`216.239.36.105`	v4	AS15169
`ns-tld4.charlestonroadregistry.com`	`216.239.38.105`	v4	AS15169
`ns-tld5.charlestonroadregistry.com`	`216.239.60.105`	v4	AS43515

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

Test With Your Computer

DNS

dig @ns-tld1.charlestonroadregistry.com phd. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D phd. SOA @ns-tld1.charlestonroadregistry.com Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://pubapi.registry.google/rdap/domain/nic.phd" | jq . Fetch RDAP JSON (positive lookup)

curl -I -sS "https://pubapi.registry.google/rdap/domain/nic.phd" Headers only (check TLS, timing)

Open in Browser View RDAP response directly

Registry Information

Active

TLD .phd

Operator Charleston Road Registry Inc.

RDAP Server https://pubapi.registry.google/rdap/ 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 .phd compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/phd/

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

Example Response

{
  "tld": "phd",
  "display_name": ".phd",
  "operator": "Charleston Road Registry 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://pubapi.registry.google/rdap/"
  },
  "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