Jeffco.us Jefferson County, CO | Official Website
The home page for Jefferson County Colorado.
Jeffco.us Overview
/100
Mobile usability 95/100
Google Analytics tracking code is present
The website follows a clear and concise structure that is well-optimized and user-friendly. The website fulfills its purpose of providing information and resources on Jefferson County, CO to its residents, visitors, and businesses. It is visually appealing, easy to navigate, and well-organized, with vibrant colors, high-resolution images, and well-designed icons and graphics.
The homepage features a header with the county logo and a responsive menu for quick and easy access to the main categories of the website. The main menu includes Home, Our County, Services, How Do I, Doing Business, and Contact Us, which are further sub-categorized to different departments and services offered by Jefferson County. The footer section contains links to important resources such as news, events, job opportunities, and social media.
The website also has a prominent search bar that enables visitors to search for specific information they are interested in or resources they are looking for. Additionally, the website features sliders and carousels with high-quality images to highlight the county's attractions, updates, and featured services, making the homepage more inviting and engaging.
The website's performance is average, with a PageSpeed Insights score of 55/100. This score indicates that the website's page load speed may not be as fast as possible, and improvements can be made in optimizing images, reducing server response time, and enabling browser caching. However, the website's mobile usability score is high, indicating that the website is compatible with different mobile devices and adaptable to different screen sizes.
The website's SSL certificate issued by DigiCert Inc ensures the safety and security of its visitors' information, protecting against malware and phishing attacks. Also, with the Google Analytics tracking code, the website can collect and analyze data about visitors' behavior, geographic location, interests, and the pages they visit, providing insights for improving the website's performance and visitor experience.
In conclusion, jeffco.us is a well-structured and engaging website that represents Jefferson County's values, history, culture, and resources. Although there is room for improvement in the website's performance, its mobile usability and safety features make it a family-friendly and valuable online resource for the county's residents, visitors, and businesses. The website showcases the county's strengths and opportunities, providing a platform for engagement, empowerment, and growth.
Jeffco.us Rank Summary
Audience Geography. Where are jeffco.us visitors located?
| Country | Visitors |
|---|---|
 United States US | 71.9% |
| Japan JP | 25.5% |
| India IN | 1% |
| Other | 1.6% |
| Country | Pageviews |
|---|---|
| United States US | 84.2% |
| Japan JP | 12.9% |
| India IN | 0.7% |
| Other | 2.2% |
| Country | Rank |
|---|---|
| United States US | 24701 |
| Japan JP | 31954 |
| India IN | 286900 |
Where do visitors go on jeffco.us?
| Subdomain | Pageviews |
|---|---|
| jeffco.us | 42.39% |
| co.jeffco.us | 12.88% |
| propertysearch.jeffco.us | 12.85% |
| inmatelookup.jeffco.us | 12.85% |
| sts.jeffco.us | 4.51% |
| gis.jeffco.us | 4.47% |
| meetings.jeffco.us | 1.11% |
| time.jeffco.us | 1% |
| other | 7.96% |
| Subdomain | Pageviews per User |
|---|---|
| co.jeffco.us | 6.9 |
| propertysearch.jeffco.us | 4.7 |
| jeffco.us | 2.4 |
| time.jeffco.us | 2 |
| meetings.jeffco.us | 2 |
| inmatelookup.jeffco.us | 2 |
| gis.jeffco.us | 1.8 |
| sts.jeffco.us | 1.4 |
| Subdomain | Reach |
|---|---|
| jeffco.us | 59% |
| inmatelookup.jeffco.us | 27.34% |
| sts.jeffco.us | 11.27% |
| propertysearch.jeffco.us | 9.33% |
| gis.jeffco.us | 8.22% |
| co.jeffco.us | 6.33% |
| time.jeffco.us | 2.1% |
| meetings.jeffco.us | 2.06% |
How popular is jeffco.us?
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 105262 | -938 |
| past month | 102971 | -2671 |
| past week | 115098 | 16837 |
| yesterday | 203471 | 100726 |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 98873 | -1784 | 55 | 3% | 3.5 | 3% |
| 30 | 99673 | 3340 | 55 | -2.9% | 3.4 | -10.58% |
| 7 | 96771 | 3264 | 6 | -3.75% | 4.5 | 20% |
| 1 | 190646 | 119612 | 28 | -66.05% | 4 | -40.58% |
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 115068 | -133 | 57 | -0.17% |
| 30 | 111676 | -5556 | 6 | 9% |
| 7 | 133620 | 25113 | 49 | -21.94% |
| 1 | 222278 | 85097 | 3 | -42.84% |
Jeffco.us Website Safety
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.
Norton ConnectSafe evaluates jeffco.us for any unsafe and insecure content. The results are critical for families with young children.
SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.
McAfee assesses jeffco.us for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze jeffco.us for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the jeffco.us. This reputation system receives ratings from users and information from third-party sources, assesses the jeffco.us for safety features and confirms, whether jeffco.us is suitable for children.
| Domain | jeffco.us |
| Issuer Organization | DigiCert Inc |
| Issuer | GeoTrust TLS RSA CA G1 |
| Algorithm | RSA-SHA512 |
| Valid form | 01/11/2024 |
| Expiration | 02/10/2025 |
| Signed | Certificate is not self signed |
| Additional Domains |
jeffco.us www.jeffco.us *.admin.co.jeffco.us *.jeffco.us |
Jeffco.us Rank History
Alexa Rank shows how popular jeffco.us is in comparison with other sites. The most popular site has Alexa Rank equals 1. If jeffco.us has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to jeffco.us and pageviews on jeffco.us over the past 3 months.
Jeffco.us Hosting Information
ASN ID: 35280
ASN Title: ACORUS NETWORKS SASLast Update: 04/13/2025
% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf
% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.
% Information related to 'AS33792 - AS35839'
as-block: AS33792 - AS35839
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2015-09-30T14:19:22Z
last-modified: 2015-09-30T14:19:22Z
source: RIPE
% Information related to 'AS35280'
% Abuse contact for 'AS35280' is 'abuse@acorus.net'
aut-num: AS35280
as-name: ACORUS
remarks: =======================================================
remarks: Informations : https://acorus.net
remarks: PeeringDB : https://as35280.peeringdb.com
remarks: =======================================================
remarks: = Transit =
remarks: =======================================================
remarks: = Telia =
import: from AS1299 action pref=1000; accept ANY
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export: to AS50894 announce ANY
export: to AS57734 announce ANY
mp-export: afi ipv4.unicast,ipv6.unicast to AS57734 announce ANY
export: to AS204657 announce ANY
export: to AS48744 announce ANY
remarks: =======================================================
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remarks: =======================================================
remarks: Peering request : peering at acorus dot net
remarks: Others infos : https://www.as35280.net
remarks: =======================================================
remarks: = Internet Exchange Point =
remarks: =======================================================
remarks: - Equinix Paris - 10G - FR - http://www.equinix-ix.fr
remarks: - 195.42.145.114 / 2001:7f8:43::3:5280:1 -
remarks: -------------------------------------------------------
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remarks: -------------------------------------------------------
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remarks: - LU-CIX - 10G - LU - http://www.lu-cix.lu
remarks: - 188.93.170.93 / 2001:7f8:4c::89d0:1 -
remarks: -------------------------------------------------------
remarks: - NL-IX - 10G - NL - https://www.nl-ix.net
remarks: - 193.239.118.47 / 2001:7f8:13::a503:5280:1 -
remarks: =======================================================
remarks:
remarks: =======================================================
remarks: = BGP Communities - as35280.net =
remarks: =======================================================
remarks:
remarks: 35280:35280 - Acorus prefixes
remarks: 64999:asn - Prefixes from the first ASN
remarks:
remarks: -------------------------------------------------------
remarks: by default, all prefixes will be tags depending on
remarks: - Region/Country/City
remarks: - type of relationship
remarks: -------------------------------------------------------
remarks: The following communities can be used by peers and customers
remarks:
remarks: -------------------------------------------------------
remarks: ** Note: These communities are evaluated
remarks: ** on a "first match win" basis
remarks: -------------------------------------------------------
remarks: x = 0 - Announce (default rule)
remarks: x = 1 - Prepend x1
remarks: x = 2 - Prepend x2
remarks: x = 3 - Prepend x3
remarks: x = 9 - Do not announce
remarks:
remarks: === Region ===
remarks: 35280:101x - Europe EU
remarks: 35280:102x - North America NA
remarks: 35280:103x - South America SA
remarks: 35280:104x - Asia AS
remarks: 35280:105x - Oceania OC
remarks: 35280:106x - Africa AF
remarks:
remarks: === Country ===
remarks: 35280:201x - France FR
remarks: 35280:202x - Luxembourg LU
remarks: 35280:203x - Netherlands NL
remarks: 35280:204x - United State of America US
remarks:
remarks: === City ===
remarks: 35280:301x - Paris PAR
remarks: 35280:302x - Toulouse TLS
remarks: 35280:303x - Luxembourg LUX
remarks: 35280:304x - New York NYC
remarks: 35280:305x - Amsterdam AMS
remarks:
remarks: === Transit ===
remarks: 35280:1000x - All transit
remarks: - 35280:1001x - Telia Sonera
remarks: - 35280:1002x - Tata Communications
remarks:
remarks: === Peering ===
remarks: 35280:2000x - All Peering
remarks:
remarks: 35280:2100x - Public Peering
remarks: - 35280:2101x - France-IX Paris
remarks: - 35280:2102x - Equinix Paris
remarks: - 35280:2103x - LU-CIX
remarks: - 35280:2104x - NL-IX
remarks:
remarks: 35280:2200x - Paid Peering
remarks: - 35280:2201x - Hopus Paris
remarks:
remarks: 35280:2300x - Private Peering
remarks: - 35280:2301x - Sipartech
remarks:
remarks: === Customers ===
remarks: 35280:3000x - All Customers
remarks:
remarks: === ASN ===
remarks: 6510x:asn - Action to ASN relationn
remarks:
remarks: -------------------------------------------------------
remarks: for 32 bits, please find below mapping 32 to 16 bits
remarks: 198435 -> 64501 (EDX Network)
remarks: 197133 -> 64502 (Mediactive)
remarks: 204657 -> 64503 (Ubicentrex)
remarks: -------------------------------------------------------
remarks:
remarks: === Change local Pref ===
remarks: -----------------------------------------
remarks: Community | Local Pref | Description
remarks: -----------------------------------------
remarks: (default) | 10000 | Customer
remarks: 35280:50 | 9950 | Customer backup
remarks: (default) | 1750 | Peer
remarks: 35280:60 | 1700 | Peer Backup
remarks: (default) | 750 | Transit
remarks: -----------------------------------------
remarks:
remarks: === Blackhole ===
remarks: 65535:666 - Blackhole prefix up to /32 (IPv4) and /128 (IPv6)
remarks:
org: ORG-ANS21-RIPE
admin-c: AN29577-RIPE
tech-c: AN29577-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: ACORUS-MNT
mnt-routes: ACORUS-MNT
created: 2015-04-01T14:17:41Z
last-modified: 2018-07-07T09:52:31Z
source: RIPE
organisation: ORG-ANS21-RIPE
org-name: ACORUS NETWORKS SAS
org-type: LIR
address: 9/11 Allée de l?Arche Tour Egée - Regus
address: 92400
address: Courbevoie
address: FRANCE
phone: +33626568135
admin-c: BS8566-RIPE
admin-c: RM16938-RIPE
admin-c: AC36269-RIPE
abuse-c: AN29577-RIPE
mnt-ref: RIPE-NCC-HM-MNT
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created: 2015-03-17T14:46:59Z
last-modified: 2018-06-30T13:16:55Z
source: RIPE # Filtered
role: Acorus Networks NOC
address: ACORUS Networks SAS
address: 9/11 Allee de l Arche
address: Tour Egee - Regus
address: 92400 Courbevoie
address: France
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phone: +33 1 84 13 81 86
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last-modified: 2018-06-30T13:18:58Z
source: RIPE # Filtered
admin-c: BS8566-RIPE
admin-c: RM16938-RIPE
admin-c: AC36269-RIPE
% This query was served by the RIPE Database Query Service version 1.91.2 (BLAARKOP)
Jeffco.us Domain Registration and Settings
Domain Name: jeffco.us
Registry Domain ID: D1878362-US
Registrar WHOIS Server:
Registrar URL: www.register.com
Updated Date: 2023-02-13T16:07:03Z
Creation Date: 2002-04-24T17:57:11Z
Registry Expiry Date: 2028-04-23T23:59:59Z
Registrar: Register.com, Inc.
Registrar IANA ID: 9
Registrar Abuse Contact Email: abuse@web.com
Registrar Abuse Contact Phone: +1.8003337680
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: C1255AEC00DA54B4FB329E4F2C6128A01-NSR
Registrant Name: Systems Team
Registrant Organization:
Registrant Street: 3500 ILLINOIS ST STE 2500
Registrant Street: IT SERVICES
Registrant Street:
Registrant City: Golden
Registrant State/Province: CO
Registrant Postal Code: 80401-6022
Registrant Country: US
Registrant Phone: +1.3032718039
Registrant Phone Ext:
Registrant Fax: +1.8886429675
Registrant Fax Ext:
Registrant Email: its-unix@co.jefferson.co.us
Registrant Application Purpose: P5
Registrant Nexus Category: C21
Registry Admin ID: C1255AEC00DA54B4FB329E4F2C6128A01-NSR
Admin Name: Systems Team
Admin Organization:
Admin Street: 3500 ILLINOIS ST STE 2500
Admin Street: IT SERVICES
Admin Street:
Admin City: Golden
Admin State/Province: CO
Admin Postal Code: 80401-6022
Admin Country: US
Admin Phone: +1.3032718039
Admin Phone Ext:
Admin Fax: +1.8886429675
Admin Fax Ext:
Admin Email: its-unix@co.jefferson.co.us
Admin Application Purpose: P5
Admin Nexus Category: C21
Registry Tech ID: CD97C1F8573E248B6868337F9E9BB0E6B-NSR
Tech Name: Domain Registrar
Tech Organization: Registercom
Tech Street: 575 8th Avenue
Tech Street:
Tech Street:
Tech City: New York
Tech State/Province: NY
Tech Postal Code: 10018
Tech Country: US
Tech Phone: +1.9027492701
Tech Phone Ext:
Tech Fax: +1.9027492701
Tech Fax Ext:
Tech Email: domainregistrar@register.com
Tech Application Purpose: P1
Tech Nexus Category: C11
Name Server: dns1.jeffco.us
Name Server: dns2.jeffco.us
Name Server: ns1.f5cloudservices.com
Name Server: ns2.f5cloudservices.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-09-20T17:13:08Z
| Host | A Record | TTL |
|---|---|---|
| jeffco.us | 199.184.241.62 | 900 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| jeffco.us | cluster6.us.messagelabs.com | 10 | 86400 |
| jeffco.us | cluster6a.us.messagelabs.com | 20 | 86400 |
| Host | NS Record | TTL |
|---|---|---|
| jeffco.us | dns1.jeffco.us | 86400 |
| jeffco.us | dns2.jeffco.us | 86400 |
| Host | TXT Record | TTL |
|---|---|---|
| jeffco.us | v=spf1 mx include:_spf.mlsend.com include:spf.protection.outlook.com include:servers.mcsv.net include:spf.messagelabs.com include:_spf.salesforce.com include:mailgun.org -all | 3600 |
| jeffco.us | xbWyPvXitPBYdA8X0s1s7a46bPnubZyJQ2q8at8rX+0= | 3600 |
| jeffco.us | MS=ms10079852 | 3600 |
| jeffco.us | YuOuZJpJrG17qnYAzhTjuS+k1nVtvqoVtQOwZG+XghslglApH+dVoG3hVaPkCiD8n7o/8oysz+iKUeIPo1HMwg== | 3600 |
dns1.jeffco.us
TTL: 86400
Email address: its-unix.jeffco.us
Serial: 2019080803
Refresh: 1200
Retry: 3600
Expire: 2419200
Minimum: 86400
Jeffco.us HTML Check
Jeffco.us Desktop Performance
Last tested: 11/15/2016
| Total Resources | 52 |
| Number of Hosts | 8 |
| Static Resources | 35 |
| JavaScript Resources | 9 |
| CSS Resources | 6 |
Jeffco.us Mobile Insights
Last tested: 05/27/2017
| Total Resources | 53 |
| Number of Hosts | 9 |
| Static Resources | 35 |
| JavaScript Resources | 9 |
| CSS Resources | 6 |
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