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60
Total
70
DNS
20
Email
65
Security
20
Network
100
Availability
Domain3lmeter.com
IPv41
IPv60
MX records2
StatusActive
Domain technical report

电能计量领域的创新先锋-洛阳高新三L电子产品有限公司

3lmeter.com

3L表计由北京斯瑞埃尔电子技术有限公司、洛阳高新三L电子产品有限公司组成。自1989年以来专业从事TDM时分割乘法器硬件原理全电子高精度关口电能表、安装式标准电能表、便携式标准电能表等电能计量仪器、仪表的研发制造。3L表计在北京中关村建有国内最早专业的电能计量仪表和数据集抄通讯产品研发中心，采用经典的TDM时分割乘法器技术，利用美国TI公司的LinBiCMOS混合集成电路ASIC制程，研制出当今世界电能计量领域尖端、精密的超大规模线性电能计量专用集成电路3L-1101系列芯片，是国内独家拥有TDM原理超大规模专用集成电路及全部自主知识产权的企业。

Generated: 2026-08-12T10:22:28-05:00 · Cached result

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IPv41
IPv60
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

!
IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

!
CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

2 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

106 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

!
HTTP security headers0 / 35 pts · Security

0 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

!
IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
49.232.165.92

AAAA

0 record(s)
—

Not configured

CNAME

0 record(s)
—

Not configured

MX

2 record(s)
5 mxbiz1.qq.com.
10 mxbiz2.qq.com.

TXT

0 record(s)
—

Not configured

NS

2 record(s)
f1g1ns1.dnspod.net.
f1g1ns2.dnspod.net.

SOA

1 record(s)
f1g1ns1.dnspod.net. freednsadmin.dnspod.com. 1761618990 3600 180 1209600 180

CAA

0 record(s)
—

Not configured

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

1 record(s)
\000.3lmeter.com. A NS SOA MX TXT AAAA SRV RRSIG NSEC DNSKEY SVCB HTTPS CAA

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Not configured
—

Not configured

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
电能计量领域的创新先锋-洛阳高新三L电子产品有限公司
Description
3L表计由北京斯瑞埃尔电子技术有限公司、洛阳高新三L电子产品有限公司组成。自1989年以来专业从事TDM时分割乘法器硬件原理全电子高精度关口电能表、安装式标准电能表、便携式标准电能表等电能计量仪器、仪表的研发制造。3L表计在北京中关村建有国内最早专业的电能计量仪表和数据集抄通讯产品研发中心，采用经典的TDM时分割乘法器技术，利用美国TI公司的LinBiCMOS混合集成电路ASIC制程，研制出当今世界电能计量领域尖端、精密的超大规模线性电能计量专用集成电路3L-1101系列芯片，是国内独家拥有TDM原理超大规模专用集成电路及全部自主知识产权的企业。
Final URL
https://3lmeter.com/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://3lmeter.com/
Version
3
Server
Microsoft-IIS/10.0
X-Powered-By
ASP.NET

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Asseco Data Systems S.A.
CN
3lmeter.com
Valid from
2025-10-27T21:56:00-05:00
Valid until
2026-11-26T20:55:59-06:00
Days remaining
106
Protocol
TLSv1.2
Cipher
ECDHE-RSA-AES256-GCM-SHA384

Security headers

0 active
—
HSTSNot detected
—
Content Security PolicyNot detected
—
X-Content-Type-OptionsNot detected
—
X-Frame-OptionsNot detected
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
49.232.165.92
308,63 ms
Cloudflare
1.1.1.1
49.232.165.92
85,51 ms
Quad9
9.9.9.9
49.232.165.92
273,50 ms
OpenDNS
208.67.222.222
49.232.165.92
197,80 ms
AdGuard
94.140.14.14
49.232.165.92
86,24 ms

IP, geolocation and ASNAssociated network information

49.232.165.92

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.216.212
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mxbiz1.qq.com

Port 25: Closed/unreachable - 29.4 ms - 
Port 465: Closed/unreachable - 4011.9 ms - 
Port 587: Closed/unreachable - 4012.9 ms -

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