.aco SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	149ms	224ms	132
7d	100%	100%	149ms	332ms	720
30d	99.75%	99.75%	148ms	408ms	2433

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	430ms	457ms	48
7d	100%	100%	431ms	462ms	240
30d	100%	99.88%	429ms	540ms	816

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%	20ms	20ms	22
7d	100%	20ms	20ms	120
30d	100%	20ms	20ms	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	222ms	14 minutes ago	local	NSID: aco-mc-vie1	OK
`DNS`	v6	109ms	160 days, 3 hours ago	local	NSID: aco-mc-vie1	OK
`DNSSEC`	v4	20ms	21 minutes ago	local	Key: 8201	OK
`DNSSEC`	v6	20ms	21 minutes ago	local	Key: 8201	OK
`RDAP`	v4	431ms	2 hours, 28 minutes ago	local	TLS 1.2	OK
`RDAP`	v6	413ms	2 hours, 28 minutes ago	local	TLS 1.2	OK

RDAP HTTPS Timing

413ms total

DNS Lookup

—

TCP Connect

98ms

TLS Handshake

203ms

Time to First Byte

413ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

3 IPs tested

Hostname	IP Address	AF	ASN
`a.dns.nic.aco`	`194.0.25.32`	v4	AS207021
`m.dns.nic.aco`	`194.0.26.12`	v4	AS201612
`n.dns.nic.aco`	`194.0.24.12`	v4	AS201612

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

Test With Your Computer

DNS

dig @a.dns.nic.aco aco. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D aco. SOA @a.dns.nic.aco Alternative using drill with DNSSEC trace

RDAP

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

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

Open in Browser View RDAP response directly

Registry Information

Active

TLD .aco

Operator ACO Severin Ahlmann GmbH & Co. KG

RDAP Server https://rdap.nic.aco/ 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 .aco compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/aco/

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

Example Response

{
  "tld": "aco",
  "display_name": ".aco",
  "operator": "ACO Severin Ahlmann GmbH & Co. KG",
  "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.nic.aco/"
  },
  "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